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Thermos Flask

Best Thermos Flask in India - Reviews and Comparison 2021

We picked the 7 best thermos flask in 2021 for your budget and use cases.

If you are looking for a container that will maintain your beverage's temperature on the go, then the thermos flask will come in handy. However, with several brands offering different flask types at different ranges, choosing the suitable thermos flask can be cumbersome. Therefore, we bring you the buyer’s guide to help you make an informed decision.

UPDATED

12/8/2021

Model

Our Rating

Rating

Capacity (in millilitres)

Heat Retention

Material

Pro's & Con's

Colour

Insulation Type

Weight (in grams)

Leak-proof

BPA-free Food Grade Material

Lid Type

Quantity Available (in millilitres)

Warranty

Thermosteel Flip Lid Flask

Milton

Thermosteel Flip Lid Flask

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Our Rating

9.9 / 10

03/2021

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1000

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Yes

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Stainless steel

Inside copper coating for better heat retention
Keeps liquid hot/cold upto 24 hrs
18/8 quality stainless steel
Ideal for gym, sports, school, and outdoors
A bit heavy
Silver
Double-wall
700
Flip-open lid
350, 500, and 750
1 year and warranty doesn’t cover damages resulting from accidents, mishandling or tampering with the mechanism

Milton

Duo DLX 1000 Thermosteel

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Our Rating

9.8 / 10

03/2021

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1000

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Yes

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Stainless steel

Inside copper coating for better heat retention
Keeps liquid hot/cold upto 24 hrs
18/8 quality stainless steel
Ideal for gym, sports, school, and outdoors
No carry case
Silver
Double-wall
512
Not mentioned
Narrow cap
350, 500, and 750
1 year and warranty doesn’t cover damages resulting from accidents, mishandling or tampering with the mechanism

Borosil

Stainless Steel Hydra Trek - Vacuum Insulated Flask

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Our Rating

9.7 / 10

03/2021

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700

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Yes

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Stainless steel

Copper coating for maximum temperature retention
Keeps liquid hot upto 20 hrs and cold for 24 hrs
18/8 quality rust-proof steel
Non-leaching and toxin-free
Black
Double-wall
400
Cup-like cover
500, 700, and 850
1 year warranty on manufacturing defect

TRANIAC

Train Like A Maniac Double Walled Vacuum Insulated Stainless Steel Flask

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Our Rating

9.6 / 10

03/2021

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1000

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Yes

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Stainless steel

Sweat free
Keeps liquid hot upto 13 hrs and cold for 36 hrs
Durable
Rubber grip facilitates easy handling
Available only in the one-litre capacity
Matte black
Double-wall
580
Non slip rubber-handled lid + flip-opne lid
Not available
1 year warranty against any types of issues

InstaCuppa

Thermos Bottle

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Our Rating

9.5 / 10

03/2021

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1000

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Yes

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Stainless steel

Modern and unique design
Keeps liquid hot upto 12 hrs and cold for 24 hrs
Slip-resistant surface
Ideal for door walks, office meetings, and workouts
Matte black
Double-wall
500
Straw lid
550 and 700
1 year

Fruitalite

Insulated Thermos Water Bottle

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Our Rating

9.2 / 10

03/2021

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1000

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Yes

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Stainless steel

Top-rack dishwasher safe
Keeps liquid hot upto 12 hrs and cold for 24 hrs
18/8 quality stainless steel
Available only in the one-litre capacity
Bubble gum
Double-wall
525
Straw lid
Not available
1 year

ORPIO (LABEL)

Stainless Steel Vacuum Insulated Travel Tea and Coffee Mug

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Our Rating

9.1 / 10

03/2021

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500

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Yes

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Stainless steel

Comfortable grip
Keeps liquid hot upto 4 hrs and cold for 6 hrs
Keeps liquid hot upto 4 hrs and cold for 6 hrs
Wide mouth ensure quick filling and cleaning
Ideal for outdoor adventure, road trips, sports event, home and office
Available only in the one-litre capacity
Golden and black
Double-wall
340
Flip-open lid
Not available
Not mentioned

Milton

Thermosteel Flip Lid Flask


1

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Our Rating

9.9 / 10

03/2021

Pro's & Con's

Inside copper coating for better heat retention
Keeps liquid hot/cold upto 24 hrs
18/8 quality stainless steel
Ideal for gym, sports, school, and outdoors
A bit heavy

Features

Capacity (in millilitres)

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1000

Heat Retention

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Yes

Material

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Stainless steel

Colour

Silver

Insulation Type

Double-wall

Weight (in grams)

700

Leak-proof

BPA-free Food Grade Material

Lid Type

Flip-open lid

Quantity Available (in millilitres)

350, 500, and 750

Warranty

1 year and warranty doesn’t cover damages resulting from accidents, mishandling or tampering with the mechanism

Your guides

Aditi Lohia

Aditi Lohia

Buyer's Guide - Best Thermos Flask in India 2021

Know all about thermos flask to buy the best one.

1

Features: Most important purchase criteria for thermos flask

What should you look for when buying a new thermos flask?

2

Use Cases: The best thermos flask for you

Which type of thermos flask is best for your use cases?

3

FAQ: Learn more about the details

Any questions left? Here they are, including answers.

4

How-To: Usage hints and care instructions for thermos flask

Best practices for thermos flask usage and care.

6

Our Picks: How we picked the best thermos flask in India 2021

Find out how we ranked our top seven thermos flask.

1. Features: Most important purchase criteria for thermos flask

1.1 Capacity

A flask's capacity is essential to consider because it will determine how much liquid you can put into it.

Thermos flasks come in several capacities, usually ranging from 350ml, 500ml, 750ml, to 1000ml. And you can choose amongst them as per your requirement. Your need may vary as per the office, gym workout, running, hiking, family picnics, or other activities.

For a short journey, a 350ml flask does the job. However, for a significant trip or to serve more members, 750ml or 1000ml will be a good choice. Also, if you are going to places where the chances are less for refilling the flask, it is best to get a flask that offers a large capacity.

A flask's capacity is essential to consider because it will determine how much liquid you can put into it.

Thermos flasks come in several capacities, usually ranging from 350ml, 500ml, 750ml, to 1000ml. And you can choose amongst them as per your requirement. Your need may vary as per the office, gym workout, running, hiking, family picnics, or other activities.

For a short journey, a 350ml flask does the job. However, for a significant trip or to serve more members, 750ml or 1000ml will be a good choice. Also, if you are going to places where the chances are less for refilling the flask, it is best to get a flask that offers a large capacity.

1.2 Material

The material of the flask is another crucial factor to consider as that decides the temperature retention. There is no shortage of the materials using which a flask can be made, but, amongst all, the double-walled stainless steel material has been proven to be the best—for example, plastic. There are manufacturers using plastic as thermal insulators. Due to being a bad insulator, plastic keeps the temperature intact only for a couple of hours. Also, it is fragile, and it is likely to break.

Metal flasks, especially stainless steel, is highly recommended due to their durability and features like resistant to corrosion, scratch-resistant, easy to clean and better heat retention. Moreover, indoor steel is capable of holding the vacuum isolation pressure inside the bottle.

Speaking of outer material, plastic is most common among manufacturers. It is lightweight and easy to carry. Some thermos flask has a metal outer casing as well. They offer solid construction and are corrosion-resistant too.

The best way to check a thermos flask's material is – a flask with an excellent thermal insulator will not get hot while pouring the hot beverage in it and won’t sweat when you pour a cold liquid inside.

The material of the flask is another crucial factor to consider as that decides the temperature retention. There is no shortage of the materials using which a flask can be made, but, amongst all, the double-walled stainless steel material has been proven to be the best—for example, plastic. There are manufacturers using plastic as thermal insulators. Due to being a bad insulator, plastic keeps the temperature intact only for a couple of hours. Also, it is fragile, and it is likely to break.

Metal flasks, especially stainless steel, is highly recommended due to their durability and features like resistant to corrosion, scratch-resistant, easy to clean and better heat retention. Moreover, indoor steel is capable of holding the vacuum isolation pressure inside the bottle.

Speaking of outer material, plastic is most common among manufacturers. It is lightweight and easy to carry. Some thermos flask has a metal outer casing as well. They offer solid construction and are corrosion-resistant too.

The best way to check a thermos flask's material is – a flask with an excellent thermal insulator will not get hot while pouring the hot beverage in it and won’t sweat when you pour a cold liquid inside.

1.3 Heat Retention

Heat retention might have found the third spot, but this factor is no less important than the first two. After all, the factor defines the amount of time for which the flask can keep the drink hot or cold. A thermos flask made from the best material can retain temperature for one whole day!

Usually, a flask can retain temperature for as low as 4-5 hours and as high as 36 hours. The retention power can vary for hot and cold beverages. And typically, the capacity for retaining the temperature of a cold liquid is much higher than a hot beverage.

Get a flask with double-wall vacuum insulation as that prevents the conduction of heat. The reflective stainless steel interior prevents heat from escaping and maintains the temperature inside the thermos.

Heat retention might have found the third spot, but this factor is no less important than the first two. After all, the factor defines the amount of time for which the flask can keep the drink hot or cold. A thermos flask made from the best material can retain temperature for one whole day!

Usually, a flask can retain temperature for as low as 4-5 hours and as high as 36 hours. The retention power can vary for hot and cold beverages. And typically, the capacity for retaining the temperature of a cold liquid is much higher than a hot beverage.

Get a flask with double-wall vacuum insulation as that prevents the conduction of heat. The reflective stainless steel interior prevents heat from escaping and maintains the temperature inside the thermos.

1.4 Insulation Type

There are two types of insulation, i.e. vacuum and foam.

The vacuum insulation creates a vacuum in the inside wall and doesn’t let the heat transfer from the outside of the bottle. Moreover, there is no air; hence, the convection does not occur, and the temperature of the liquid is retained inside the bottle. On the other hand, in the foam insulation mechanism, the convection is prevented using foam. Foam doesn’t let air circulate easily; thereby, the heat cannot transfer from the outside of the bottle to the inside.

Thermos flask with vacuum insulation is preferred as it maintains the temperature for a longer time as compared to the flasks with foam insulation.

Vacuum insulated flask uses double-wall construction that creates a gap between the beverage and the bottle's exterior shell. This wall neither lets the heat or cool air escape from the flask nor enter it. So, the lid is the only medium for air to enter or escape. Hence, such a flask keeps your beverage hot or cold for long hours.

There are two types of insulation, i.e. vacuum and foam.

The vacuum insulation creates a vacuum in the inside wall and doesn’t let the heat transfer from the outside of the bottle. Moreover, there is no air; hence, the convection does not occur, and the temperature of the liquid is retained inside the bottle. On the other hand, in the foam insulation mechanism, the convection is prevented using foam. Foam doesn’t let air circulate easily; thereby, the heat cannot transfer from the outside of the bottle to the inside.

Thermos flask with vacuum insulation is preferred as it maintains the temperature for a longer time as compared to the flasks with foam insulation.

Vacuum insulated flask uses double-wall construction that creates a gap between the beverage and the bottle's exterior shell. This wall neither lets the heat or cool air escape from the flask nor enter it. So, the lid is the only medium for air to enter or escape. Hence, such a flask keeps your beverage hot or cold for long hours.

1.5 Durability

Durability is vital as you will not keep the flask in the cup holder of your car safely. There are chances that you will carry it for outdoor activities where it may accidentally fall and breakdown or get scratches. Similarly, if your flask is made using material that is not corrosion-free, its life will be over soon.

Basically, any flask which is not helping in retaining the temperature is not worth using. A thermos flask should be made of strong and durable materials keeping the vacuum intact and offering the best performance.

Stainless steel flasks are preferred as they are strong enough to hold the vacuum, withstands accidents or bumps for a long duration and are rust-free.

Durability is vital as you will not keep the flask in the cup holder of your car safely. There are chances that you will carry it for outdoor activities where it may accidentally fall and breakdown or get scratches. Similarly, if your flask is made using material that is not corrosion-free, its life will be over soon.

Basically, any flask which is not helping in retaining the temperature is not worth using. A thermos flask should be made of strong and durable materials keeping the vacuum intact and offering the best performance.

Stainless steel flasks are preferred as they are strong enough to hold the vacuum, withstands accidents or bumps for a long duration and are rust-free.

1.6 Leakproof

A good thermos flask has an insulated, strong and secure lid with a proper locking system that successfully prevents leakage from the bottle.

The lid should not easily come off, and at the same time, it should be easy to clean. Also, it should loosen and tighten easily while fitting the flask flawlessly. Thermoses that come with corks look attractive. However, they are often not as effective in preventing leakage. Screw caps keep in place and hence, often preferred.

A good thermos flask has an insulated, strong and secure lid with a proper locking system that successfully prevents leakage from the bottle.

The lid should not easily come off, and at the same time, it should be easy to clean. Also, it should loosen and tighten easily while fitting the flask flawlessly. Thermoses that come with corks look attractive. However, they are often not as effective in preventing leakage. Screw caps keep in place and hence, often preferred.

1.7 Food Grade Material

The thermos flask must be made up using 100% food-grade materials. 304 food-grade stainless steel is considered the best material to make a flask as it is free of corrosion, BPA, and rust. Such material ensures whatever you are consuming is safe and free from chemicals or toxin elements. Moreover, the material is known for its durability and is also environmental-friendly.

The thermos flask must be made up using 100% food-grade materials. 304 food-grade stainless steel is considered the best material to make a flask as it is free of corrosion, BPA, and rust. Such material ensures whatever you are consuming is safe and free from chemicals or toxin elements. Moreover, the material is known for its durability and is also environmental-friendly.

1.8 Design

We might have listed simple and classy looking flasks, but you can find beautifully painted and engraved images flasks for a bohemian or unique look. Such flasks feature vibrant colours, beautiful artwork and meet the purpose of those who want a break from monochrome looks. Moreover, there are touristy flasks, sports flasks, flasks decorated with funny images, and official RAF hip flasks.

We might have listed simple and classy looking flasks, but you can find beautifully painted and engraved images flasks for a bohemian or unique look. Such flasks feature vibrant colours, beautiful artwork and meet the purpose of those who want a break from monochrome looks. Moreover, there are touristy flasks, sports flasks, flasks decorated with funny images, and official RAF hip flasks.

1.9 Construction

Our top thermos flasks have copper coating as that helps in retaining heat. So, it is one of the essential things to consider when we talk about construction. Silicon powdered coating on the outside is another thing that should form part of a flask. Besides, the best thermos flasks are usually made with 304 food-grade stainless steel material.

Our top thermos flasks have copper coating as that helps in retaining heat. So, it is one of the essential things to consider when we talk about construction. Silicon powdered coating on the outside is another thing that should form part of a flask. Besides, the best thermos flasks are usually made with 304 food-grade stainless steel material.

1.10 Weight

Weight matters while buying a thermos flask because you have to carry it in your hands or a backpack. Also, you will hold it to pour liquid in the cup or drink directly from the nozzle. If it is a heavy flask, holding can be a bit cumbersome. Overall, a heavy thermos can be inconvenient in every manner.

The best flask is one that is lightweight and doesn’t take much space.

Weight matters while buying a thermos flask because you have to carry it in your hands or a backpack. Also, you will hold it to pour liquid in the cup or drink directly from the nozzle. If it is a heavy flask, holding can be a bit cumbersome. Overall, a heavy thermos can be inconvenient in every manner.

The best flask is one that is lightweight and doesn’t take much space.

1.11 Lid Type

Not just flasks vary in shape and size, but their lids differ too. A flask can have a flip-open lid, narrow mouth, or a wide mouth lid with a cup-like cover. The narrow and flip-open top lets you drink directly from the bottle whereas, the wide mouth lid is about pouring your drink into the cup-like cover. In other words, you can use the lid/cover as a mug to drink your beverage conveniently. It is perfect for the outdoors and when you don’t want to carry an extra cup with you. Typically, a thermos cup is made using the same material as the flask to retain heat in much the same way.

Not just flasks vary in shape and size, but their lids differ too. A flask can have a flip-open lid, narrow mouth, or a wide mouth lid with a cup-like cover. The narrow and flip-open top lets you drink directly from the bottle whereas, the wide mouth lid is about pouring your drink into the cup-like cover. In other words, you can use the lid/cover as a mug to drink your beverage conveniently. It is perfect for the outdoors and when you don’t want to carry an extra cup with you. Typically, a thermos cup is made using the same material as the flask to retain heat in much the same way.

1.12 Easy to Clean

Get a thermos flask or bottle which is easy to clean from inside. For this purpose, a flask with a wide mouth or adjustable opening is preferred as they offer easy cleaning. For a thermos bottle with a narrow mouth, you can use a soft bristle brush to get rid of the odour and stains.

Get a thermos flask or bottle which is easy to clean from inside. For this purpose, a flask with a wide mouth or adjustable opening is preferred as they offer easy cleaning. For a thermos bottle with a narrow mouth, you can use a soft bristle brush to get rid of the odour and stains.

1.13 Cost

There are various options to choose from when it comes to thermos flasks. They can be very cheap to surprisingly expensive. If you think that more price means that the flask is of higher quality, we would say think again because this is not always the case. A few cheaper flasks may function better than the higher-range flask. All-in-all, you can find a durable and well-performing thermos flask between ₹300 – ₹1500.

There are various options to choose from when it comes to thermos flasks. They can be very cheap to surprisingly expensive. If you think that more price means that the flask is of higher quality, we would say think again because this is not always the case. A few cheaper flasks may function better than the higher-range flask. All-in-all, you can find a durable and well-performing thermos flask between ₹300 – ₹1500.

1.14 Warranty

Any product coming from a manufacturer with a warranty proves to be reliable, even a thermos flask. Choose a flask coming with a reasonable warranty period, such as six months to 1 year. Moreover, if you are buying a flask online, it is hard to tell how well the flask will hold up despite reading the customer reviews. The warranty works there too, as you can send it back for a refund/exchange if it does not function as advertised.

Any product coming from a manufacturer with a warranty proves to be reliable, even a thermos flask. Choose a flask coming with a reasonable warranty period, such as six months to 1 year. Moreover, if you are buying a flask online, it is hard to tell how well the flask will hold up despite reading the customer reviews. The warranty works there too, as you can send it back for a refund/exchange if it does not function as advertised.

1.15 Other Features

  • A flask with a carrying handle makes it easier to move around, especially if you are carrying a hot beverage in it.

  • Look for a firm flask grip. Flasks with rubber grips or a powdered-coat finish are the best.

  • If driving, choose a slim travel tape that fits into a cup holder for a car. 

  • If you will take a thermos bottle while running or training, get the one with a carrying strap or clips on the bottle as they offer a comfortable grip.

  • Flasks also come with carrying case to preventing leakage. 

  • A flask with a carrying handle makes it easier to move around, especially if you are carrying a hot beverage in it.

  • Look for a firm flask grip. Flasks with rubber grips or a powdered-coat finish are the best.

  • If driving, choose a slim travel tape that fits into a cup holder for a car. 

  • If you will take a thermos bottle while running or training, get the one with a carrying strap or clips on the bottle as they offer a comfortable grip.

  • Flasks also come with carrying case to preventing leakage. 

2. Use Cases: The best thermos flask for you

2.1 I need a thermos flask to carry it while running. Which is the best flask for me?

Any lightweight thermos flask with a carrying strap and nozzle like lid will be great for you.

Any lightweight thermos flask with a carrying strap and nozzle like lid will be great for you.

3. FAQ: Learn more about the details

3.1 Can I put milk in a thermos flask?

Yes. You can keep both cold and hot milk in a thermos flask and other vacuum insulated stainless steel flasks. It won’t damage the product.

Yes. You can keep both cold and hot milk in a thermos flask and other vacuum insulated stainless steel flasks. It won’t damage the product.

3.2 Can I put my thermos in a dishwasher?

Usually, it is not safe to put a thermos flask in a dishwasher as the space between the outer and inner layer can get filled with water. However, if the brand has clearly mentioned that the flask is dishwasher proof, then you can put it in a dishwasher.

Usually, it is not safe to put a thermos flask in a dishwasher as the space between the outer and inner layer can get filled with water. However, if the brand has clearly mentioned that the flask is dishwasher proof, then you can put it in a dishwasher.

3.3 How can I make a vacuum thermos flask more effective?

Pre-heating or pre-cooling is the best way to improve the effectiveness of a thermos flask. Before filling it with the final beverage, fill the bottle with hot water or cold water (depending on the liquid type). Let it rest for about 3 to 5 minutes. Rinse it off, and then pour the desired beverage.

Pre-heating or pre-cooling is the best way to improve the effectiveness of a thermos flask. Before filling it with the final beverage, fill the bottle with hot water or cold water (depending on the liquid type). Let it rest for about 3 to 5 minutes. Rinse it off, and then pour the desired beverage.

3.4 How safe it is to use a thermos flask made up of 18/8 stainless steel?

18/18 stainless steel is a combination of 18% chromium and 8% nickel. It is entirely safe to use as it is highly sustainable and food-grade material.

18/18 stainless steel is a combination of 18% chromium and 8% nickel. It is entirely safe to use as it is highly sustainable and food-grade material.

3.5 Is a thermos having both copper and steel material worth buying?

To improve the flask's efficiency, copper is used with steel as copper is a better conductor of heat than stainless steel. Moreover, copper also helps in preventing the bottle from getting hot from the outside.

To improve the flask's efficiency, copper is used with steel as copper is a better conductor of heat than stainless steel. Moreover, copper also helps in preventing the bottle from getting hot from the outside.

3.6 Why I should prefer a thermos bottle over a glass bottle?

Glass bottles are the least preferred as they are prone to breaking down, difficult to clean, and hard to carry because of heavyweight. Thermos flask has the upper hand in all this.

Glass bottles are the least preferred as they are prone to breaking down, difficult to clean, and hard to carry because of heavyweight. Thermos flask has the upper hand in all this.

3.7 Why I should choose a BPA-free thermos flask?

Organic compound, Bisphenol A, has some significant health concerns like cancer, reduced fertility, diabetes, etc. If the flask is made with BPA-free material, it reduces these concerns by eliminating the chemical from its material.

Organic compound, Bisphenol A, has some significant health concerns like cancer, reduced fertility, diabetes, etc. If the flask is made with BPA-free material, it reduces these concerns by eliminating the chemical from its material.

3.8 How to remove the foul odour from the thermos flask?

You can get rid of that foul smell from your flask by cleaning it with baking soda or simple detergent along with water. Besides, you must ensure that the flask is completely dried up before you use it, as it can still have the smell of detergent.

You can get rid of that foul smell from your flask by cleaning it with baking soda or simple detergent along with water. Besides, you must ensure that the flask is completely dried up before you use it, as it can still have the smell of detergent.

3.9 Why does my thermos flask smell bad?

Few of the reasons that your thermos smell bad could be:

  • It has been sitting with the lid on for a day or longer with or without any liquid in it.

  • The liquid in it has spoiled.

Few of the reasons that your thermos smell bad could be:

  • It has been sitting with the lid on for a day or longer with or without any liquid in it.

  • The liquid in it has spoiled.

3.10 What are the benefits of using a thermos flask?

  • It saves money. You need not buy tea or coffee again and again. Simply get your coffee and take a sip.

  • A thermos flask is portable, and you can literally carry it everywhere.

  • It reduces food wastage as you can keep the liquid in the flask rather than throwing it.

  • It helps in saving the environment. You can refill the flask anytime. There is a reduction in the usage of paper or plastic. Ultimately, it helps in lowering the carbon footprint in the environment.

  • It saves money. You need not buy tea or coffee again and again. Simply get your coffee and take a sip.

  • A thermos flask is portable, and you can literally carry it everywhere.

  • It reduces food wastage as you can keep the liquid in the flask rather than throwing it.

  • It helps in saving the environment. You can refill the flask anytime. There is a reduction in the usage of paper or plastic. Ultimately, it helps in lowering the carbon footprint in the environment.

4. How-To: Usage hints and care instructions for thermos flask

4.1 How to maintain a thermos flask?

  • Clean the thermos flask with warm water.

  • Always wash up the liquid before initial use.

  • For effective results, pre-fill the flask for 3 minutes with hot water (for hot beverages) and cold water (for cold drinks).

  • Do not use a microwave to pre-heat the flask.

  • Do not overfill the flask. Leave some space to fit the stopper.

  • Rinse the flask in warm water if you haven’t used it for some time.

  • Avoid submerging the bottle in water as water may get in between the liner and bottle.

  • Never use chlorine bleach for cleaning the flask as it can damage the steel weld.

  • Clean the thermos flask with warm water.

  • Always wash up the liquid before initial use.

  • For effective results, pre-fill the flask for 3 minutes with hot water (for hot beverages) and cold water (for cold drinks).

  • Do not use a microwave to pre-heat the flask.

  • Do not overfill the flask. Leave some space to fit the stopper.

  • Rinse the flask in warm water if you haven’t used it for some time.

  • Avoid submerging the bottle in water as water may get in between the liner and bottle.

  • Never use chlorine bleach for cleaning the flask as it can damage the steel weld.

4.2 What are the cleaning tips for a thermos flask?

Here are some quick cleaning tips to remove foul odour and keep the flask germ-free:

Use a teabag

Put the teabag in a vacuum flask and then pour boiling water into it. Leave the mixture in the vacuum bottle overnight. Throw away the mix in the morning, and your flask will be impeccably clean.

Use baking soda

Baking soda is an innovative and affordable option. It will clean your entire thermos, including the lid. You can either stick to just baking soda or use a mix of baking soda and vinegar.
Simply, put a teaspoon of apple cider vinegar and baking soda each in warm water. Let the mixture sit in the flask. Scrub it and rinse well. Dry the flask before using it.

Vinegar

Vinegar helps not only in thorough cleaning of the flask but also in removing coffee or soup stains. Mix vinegar with ice cubes or warm water and shake it for a few minutes in the bottle or flask. Scrub the flask walls with a soft brush and rinse them. Dry the flask before using it.

Here are some quick cleaning tips to remove foul odour and keep the flask germ-free:

Use a teabag

Put the teabag in a vacuum flask and then pour boiling water into it. Leave the mixture in the vacuum bottle overnight. Throw away the mix in the morning, and your flask will be impeccably clean.

Use baking soda

Baking soda is an innovative and affordable option. It will clean your entire thermos, including the lid. You can either stick to just baking soda or use a mix of baking soda and vinegar.
Simply, put a teaspoon of apple cider vinegar and baking soda each in warm water. Let the mixture sit in the flask. Scrub it and rinse well. Dry the flask before using it.

Vinegar

Vinegar helps not only in thorough cleaning of the flask but also in removing coffee or soup stains. Mix vinegar with ice cubes or warm water and shake it for a few minutes in the bottle or flask. Scrub the flask walls with a soft brush and rinse them. Dry the flask before using it.

5. Did you know: Interesting facts, figures and things to know about thermos flask

5.1 Scottish scientist Sir James Dewar invented the vacuum flask in 1892. There was a need to keep a chemical placed in a flask at a stable temperature. To maintain the temperature, he put a glass bottle in another larger glass bottle which evacuated the air between the two bottle walls.

5.2 The thermos was not manufactured for commercial use until 1904 when two German glass blowers formed Thermos GmbH.

5.3 A resident of Munich came up with the name ​​” thermos”. It was derived from the Greek word “thermal”, meaning hot.

5.4 Thermos is a proprietary name applicable to a form protected by a metal casing.

5.5 In 1923, Alaska Yukon Pacific introduced Thermos Jumbo Jug, which was actually a large insulated food storage jar.

5.6 Since 1957, the popularity of the product reached worldwide. In the same period, a thermos flask was widely used to transport various materials, such as insulin, tissues, and blood plasma.

5.7 Thermos is used not just to store drinks but also to transport products like nitrogen, oxygen or expensive elements such as liquid helium.

5.1 Scottish scientist Sir James Dewar invented the vacuum flask in 1892. There was a need to keep a chemical placed in a flask at a stable temperature. To maintain the temperature, he put a glass bottle in another larger glass bottle which evacuated the air between the two bottle walls.

5.2 The thermos was not manufactured for commercial use until 1904 when two German glass blowers formed Thermos GmbH.

5.3 A resident of Munich came up with the name ​​” thermos”. It was derived from the Greek word “thermal”, meaning hot.

5.4 Thermos is a proprietary name applicable to a form protected by a metal casing.

5.5 In 1923, Alaska Yukon Pacific introduced Thermos Jumbo Jug, which was actually a large insulated food storage jar.

5.6 Since 1957, the popularity of the product reached worldwide. In the same period, a thermos flask was widely used to transport various materials, such as insulin, tissues, and blood plasma.

5.7 Thermos is used not just to store drinks but also to transport products like nitrogen, oxygen or expensive elements such as liquid helium.

6. Our Picks: How we picked the best thermos flask in India 2021

A few things matter the most while buying a thermos flask, i.e. its capacity, material, and heat retention capacity. We focused on these prime features, and flasks living up to them were shortlisted. To select our top seven best thermos flask, we took into account a few other features along with customer reviews and ratings.

Read on to know more about the top seven best thermos flask brand in India.

A few things matter the most while buying a thermos flask, i.e. its capacity, material, and heat retention capacity. We focused on these prime features, and flasks living up to them were shortlisted. To select our top seven best thermos flask, we took into account a few other features along with customer reviews and ratings.

Read on to know more about the top seven best thermos flask brand in India.

6.1 Milton Thermosteel Flip Lid Flask

Milton Thermosteel flip lid flask is made of high-quality stainless steel and has a premium finishing. It has 1000 millilitres capacity, which makes it suitable for a long journey as well.

It is an insulated double-walled vacuum flask designed for maximum temperature retention keeping your favourite hot and cold beverages at their original temperature for a prolonged time. As per manufacturers, the temperature is retained for 24 hours.

Milton is a brand known for designing toxic-free products. Therefore, this flask is also made using BPA free, 100% food-grade stainless steel. Any drink consumed from this flask is safe for your health. Also, the taste and nutritional value of the drinks remain intact for a long time.

It is a leakproof product. Besides, the unique flip lid makes pouring completely hassle-free and spill-free. The top further has a cover that can be used as a cup for drinking. The flask comes with a carrying cover for the complete safety of the flask and liquid in it.

The Milton flask is durable and an appropriate choice for anyone looking for a long-lasting, easy to clean rust-free, sturdy thermos option.

The thermos is suitable for gym, school, office or any outdoor purpose. From water to juice, tea, coffee, you can carry almost anything in it. However, it is not ideal for carbonated drinks.

Milton Thermosteel flip lid flask is made of high-quality stainless steel and has a premium finishing. It has 1000 millilitres capacity, which makes it suitable for a long journey as well.

It is an insulated double-walled vacuum flask designed for maximum temperature retention keeping your favourite hot and cold beverages at their original temperature for a prolonged time. As per manufacturers, the temperature is retained for 24 hours.

Milton is a brand known for designing toxic-free products. Therefore, this flask is also made using BPA free, 100% food-grade stainless steel. Any drink consumed from this flask is safe for your health. Also, the taste and nutritional value of the drinks remain intact for a long time.

It is a leakproof product. Besides, the unique flip lid makes pouring completely hassle-free and spill-free. The top further has a cover that can be used as a cup for drinking. The flask comes with a carrying cover for the complete safety of the flask and liquid in it.

The Milton flask is durable and an appropriate choice for anyone looking for a long-lasting, easy to clean rust-free, sturdy thermos option.

The thermos is suitable for gym, school, office or any outdoor purpose. From water to juice, tea, coffee, you can carry almost anything in it. However, it is not ideal for carbonated drinks.

6.2 Milton Duo DLX 1000 Thermosteel

Duo DLX is a thermos bottle from our winning brand. It is made using stainless steel and has the same temperature retaining feature as our winner. It keeps the liquid hot or cold for up to 24 hours. It also has an inside copper coating for better heat retention. So, the only way to escape the heat is when the lid is open.

The silver colour steel bottle has double-wall vacuum insulation keeping your drinks fresh for a long time. The bottle is made using BPA-free, 100% food-grade stainless steel, which is lauded for its durability and non-chemical nature. The material is such that the liquid's taste remains the same and is not bad for your health.

The design and compact structure of the bottle make it suitable for carrying on a day-trip or hike. This is a leak-proof bottle that comes in a convenient size. You can easily put it in the backpack's side compartments to enjoy portability. Even the lid design is excellent and sturdy with a screw-top cap, which ensures zero spills at all times. The narrow mouth and simplicity of the threaded lid provide hassle-free access to your favourite beverage at any time.

Duo DLX is a thermos bottle from our winning brand. It is made using stainless steel and has the same temperature retaining feature as our winner. It keeps the liquid hot or cold for up to 24 hours. It also has an inside copper coating for better heat retention. So, the only way to escape the heat is when the lid is open.

The silver colour steel bottle has double-wall vacuum insulation keeping your drinks fresh for a long time. The bottle is made using BPA-free, 100% food-grade stainless steel, which is lauded for its durability and non-chemical nature. The material is such that the liquid's taste remains the same and is not bad for your health.

The design and compact structure of the bottle make it suitable for carrying on a day-trip or hike. This is a leak-proof bottle that comes in a convenient size. You can easily put it in the backpack's side compartments to enjoy portability. Even the lid design is excellent and sturdy with a screw-top cap, which ensures zero spills at all times. The narrow mouth and simplicity of the threaded lid provide hassle-free access to your favourite beverage at any time.

6.3 Borosil - Stainless Steel Hydra Trek - Vacuum Insulated Flask

If you need a thermos flask with a wide mouth, same as our comparison winner, and also something colourful, this vacuum insulated flask from Borosil is best for you. It shares several features with Milton Thermosteel Flip Lid Flask.

It is a double-wall insulated flask that keeps hot beverage hot for 20 hours and cold liquid chill for 24 hours. Our review is for black colour, 700ml flask, however, it is also available in several other colours & capacity such as blue, red, green, yellow, grey and metallic blue. The size range is 500 ml and 850 ml beside 700 ml. The only downside is it is not a leakproof bottle.

The thermos flask is an insulated double-wall vacuum with copper coating for maximum temperature retention. The flask is made of BPA-free, non-leaching and toxin-free material for healthy drinking.

The design and construction are outstanding. The flask is easy to carry in any backpack, rucksack, office and school bag. Also, the flask features a wide mouth specifically designed to enable drip-free sipping as well as broad enough for ice-cubes for extra-chilled drinks.

You can hold it without any worries. The exterior remains condensation-free, ensuring that your hands and bag stay dry and that the flask doesn’t slip while holding.

If you need a thermos flask with a wide mouth, same as our comparison winner, and also something colourful, this vacuum insulated flask from Borosil is best for you. It shares several features with Milton Thermosteel Flip Lid Flask.

It is a double-wall insulated flask that keeps hot beverage hot for 20 hours and cold liquid chill for 24 hours. Our review is for black colour, 700ml flask, however, it is also available in several other colours & capacity such as blue, red, green, yellow, grey and metallic blue. The size range is 500 ml and 850 ml beside 700 ml. The only downside is it is not a leakproof bottle.

The thermos flask is an insulated double-wall vacuum with copper coating for maximum temperature retention. The flask is made of BPA-free, non-leaching and toxin-free material for healthy drinking.

The design and construction are outstanding. The flask is easy to carry in any backpack, rucksack, office and school bag. Also, the flask features a wide mouth specifically designed to enable drip-free sipping as well as broad enough for ice-cubes for extra-chilled drinks.

You can hold it without any worries. The exterior remains condensation-free, ensuring that your hands and bag stay dry and that the flask doesn’t slip while holding.

6.4 TRANIAC - Train Like A Maniac Double Walled Vacuum Insulated Stainless Steel Flask

The Double Walled Vacuum Insulated Stainless Steel Flask from TRANIAC might be a bit pricey, but with all the features and accessories it comes with, the price is very much justified.

This 1000 millilitres matte black bottle is BPA-free and made from durable 18/8 food-grade stainless steel. It is engineered to support you at the highest level. The flask has a rubber grip from top to bottom, due to which you get more control while walking, jogging, or moving around. There is no risk of dropping it while you’re on the go.

The flask offers vacuum insulated temperature retention, thereby retaining cold temperatures for up to 36 hours and hot temperature for up to 13 hours. In addition to this, the flask is made with "No Temperature Transfer - Foam Insulation Technology", ensuring maximum insulation - irrespective of the fact what temperature is outside. You can even call it "Mini Freezer" or "Mini Heater". The metal bottle is fit for keeping water, juice, coffee, tea and alike.

The flask is durable and has a strong, wide-mouth semicircular lid, which lets you take big gulps. The cup is most suited if you want to have tea or coffee. For water and juice, the flask comes with a sipper lid as well. It is the only flask on our list with two lids.

The Double Walled Vacuum Insulated Stainless Steel Flask from TRANIAC might be a bit pricey, but with all the features and accessories it comes with, the price is very much justified.

This 1000 millilitres matte black bottle is BPA-free and made from durable 18/8 food-grade stainless steel. It is engineered to support you at the highest level. The flask has a rubber grip from top to bottom, due to which you get more control while walking, jogging, or moving around. There is no risk of dropping it while you’re on the go.

The flask offers vacuum insulated temperature retention, thereby retaining cold temperatures for up to 36 hours and hot temperature for up to 13 hours. In addition to this, the flask is made with "No Temperature Transfer - Foam Insulation Technology", ensuring maximum insulation - irrespective of the fact what temperature is outside. You can even call it "Mini Freezer" or "Mini Heater". The metal bottle is fit for keeping water, juice, coffee, tea and alike.

The flask is durable and has a strong, wide-mouth semicircular lid, which lets you take big gulps. The cup is most suited if you want to have tea or coffee. For water and juice, the flask comes with a sipper lid as well. It is the only flask on our list with two lids.

6.5 InstaCuppa Thermos Bottle

Instacuppa is a renowned brand offering a wide range of products in India. Instacuppa is an extension of our winner brand-Milton.

InstaCuppa thermos bottle has 1000 ml storage capacity and 12-24 hours of temperature retention capacity. Therefore, you can enjoy a large quality of beverage for long hours. With almost one whole day temp retention capacity, the thermos is fit for carrying long journey as well.

With InstaCuppa, you will not have to settle for a boring plastic bottle that might be made of poor quality material and keep the liquid at room temperature. This thermos bottle comes with BPA-free, premium food-grade 18/8 stainless steel walls combined with vacuum insulation which keeps cold beverages cold for 24 hours and hot beverages hot for up to twelve hours. Moreover, the taste of the liquid will not change, nor will it have any side effect on your health.

The thermos bottle is slip-proof and leak-proof. Besides stylish design, it also has a modern lid with a nozzle.

Instacuppa is a renowned brand offering a wide range of products in India. Instacuppa is an extension of our winner brand-Milton.

InstaCuppa thermos bottle has 1000 ml storage capacity and 12-24 hours of temperature retention capacity. Therefore, you can enjoy a large quality of beverage for long hours. With almost one whole day temp retention capacity, the thermos is fit for carrying long journey as well.

With InstaCuppa, you will not have to settle for a boring plastic bottle that might be made of poor quality material and keep the liquid at room temperature. This thermos bottle comes with BPA-free, premium food-grade 18/8 stainless steel walls combined with vacuum insulation which keeps cold beverages cold for 24 hours and hot beverages hot for up to twelve hours. Moreover, the taste of the liquid will not change, nor will it have any side effect on your health.

The thermos bottle is slip-proof and leak-proof. Besides stylish design, it also has a modern lid with a nozzle.

6.6 Fruitalite Insulated Thermos Water Bottle

This is a colourful thermos of 1000 ml. It is a BPA free food-grade safe material that has been used to make the thermos flask. 18/8 stainless steel has been used to ensure liquid stored in the bottle remains healthy and gives a clean taste.

The thermos is leak-proof and has a high-temperature retention capacity-12 hours is for a hot beverage, and 24 hours is for a cold beverage. The powder coating is also there for further temperature retention. Moreover, the flask has a wide mouth which makes it easy for cleaning. And the top-rack dishwasher safe nature makes it further easier to clean.

Besides, unique colour, the bottle has a great design and straw lid. You can have a sip at a single flip.

This is a colourful thermos of 1000 ml. It is a BPA free food-grade safe material that has been used to make the thermos flask. 18/8 stainless steel has been used to ensure liquid stored in the bottle remains healthy and gives a clean taste.

The thermos is leak-proof and has a high-temperature retention capacity-12 hours is for a hot beverage, and 24 hours is for a cold beverage. The powder coating is also there for further temperature retention. Moreover, the flask has a wide mouth which makes it easy for cleaning. And the top-rack dishwasher safe nature makes it further easier to clean.

Besides, unique colour, the bottle has a great design and straw lid. You can have a sip at a single flip.

6.7 ORPIO (LABEL) Stainless Steel Vacuum Insulated Travel Tea and Coffee Mug

This golden and black colour easy-to-grip travel mug has a sheen finish with double-wall insulation. The mug has found the last spot as the temperature retention duration is less than our other thermos flask. It is a mug best suited for those looking for less quantity thermos and need to use it for a few hours.

Its double-wall insulation locks in the temperature and produces a hot or cold beverage cup even after 4-6 hours. This 500 ml capacity mug has a wide mouth which makes it easier for you to clean it. Its lid part is as stylish as its body. There is an adjustable handle insulated exterior design to make it easier for you to carry it by hand. Also, there is a smart button on the lid. You can either drink coffee directly by opening the button or insert a straw into the switch's small opening. You can enjoy your drink without opening the lid.

The thermos mug has a sleek appearance and comes loaded with practical features. Furthermore, it is made with high-quality stainless steel and food-grade PP with BPA free polypropylene lid, which makes the mug durable and prevents bacteria's increase. Checkout buying guide, reviews and comparison of best egg boilers, best exhaust fan, best kitchen chimneys, best dishwashers, best non electric water purifiers, best water purifiers in India.

This golden and black colour easy-to-grip travel mug has a sheen finish with double-wall insulation. The mug has found the last spot as the temperature retention duration is less than our other thermos flask. It is a mug best suited for those looking for less quantity thermos and need to use it for a few hours.

Its double-wall insulation locks in the temperature and produces a hot or cold beverage cup even after 4-6 hours. This 500 ml capacity mug has a wide mouth which makes it easier for you to clean it. Its lid part is as stylish as its body. There is an adjustable handle insulated exterior design to make it easier for you to carry it by hand. Also, there is a smart button on the lid. You can either drink coffee directly by opening the button or insert a straw into the switch's small opening. You can enjoy your drink without opening the lid.

The thermos mug has a sleek appearance and comes loaded with practical features. Furthermore, it is made with high-quality stainless steel and food-grade PP with BPA free polypropylene lid, which makes the mug durable and prevents bacteria's increase. Checkout buying guide, reviews and comparison of best egg boilers, best exhaust fan, best kitchen chimneys, best dishwashers, best non electric water purifiers, best water purifiers in India.

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