10 Best Thermos bottle in India 2020- Reviews & Beginner’s guide


This is the ultimate guide to the 10 Best Thermos bottle in India 2020. This post contains affiliate links. For more information visit disclaimer

Table Of Contents

A thermosteel bottle also known as a thermos bottle is a container specially designed to maintain the temperature of the drinks stored in it. We can store beverages at the same temperature for up to 24 hours. A thermos bottle is available in different materials, such as glass or steel. Nowadays, the thermo-steel bottle has new colors, shapes, and sizes. These are lightweight, designed to eliminate sweating and leakage.

Thermos bottleCapacityTemperature
[in Hours]
Buy at Amazon
Milton Duo DLX7 sizes24
Milton Flip Lid 4 sizes24
InstaCuppa Thermos1000 mlhot-12
Borosil Hydra Trek700 mlhot-20
TRANIAC Flask1000 mlhot-13
Milton Glassy Flask1000 ml24
Cello Swift Flask6 sizes24
UNIGEAR Bottle500 mlhot-12
Borosil TRANS BOLT750 ml24
Milton Vertex 710 ml,
920 ml

Top 10 best thermos bottle in India 2020

Milton Thermosteel Duo DLX

It is the best thermos bottle in all aspects. The best thing about this thermosteel bottle is that it is available in various colors and sizes. It is available in 8 different colors and eight different sizes. It has a 1-year warranty from the manufacturer and keeps the liquid temperature hot / cold for up to 24 hours. You can avail this model with bottle cover.


  • Material used in stainless steel and corrosion resistant
  • Can retain temperature up to 24 hour
  • It has copper inner coating for better temperature regulation
  • Portable design
  • Uses double wall installation


  • Simple Design

Milton Thermosteel Flip Lid Flask

This is another variant from the very best thermos bottle brand Milton. This variant has a wide opening and flip lid making it easier to fill beverages in it. This thermos bottle is available in 4 different sizes 350 ml, 500 ml, 750 ml, 1000 ml. This variant comes with a bottle cover and is double wall insulated.


  • Flip lid makes pouring the liquid easy
  • Can retain temperature for up to 24 hour
  • Vacuum insulated with inner and outer steel
  • Cover makes it easy to carry


  • Is available in only one color

InstaCuppa Thermos Bottle

This is a very stylish thermos bottle designed by InstaCuppa services. It has a double-wall, vacuum-insulated design which can keep the beverages hot for 12 hours and cold for 24 hours. It is leak-proof and eliminates condensation which gives you a good grip over the bottle. Its capacity is 1000 ml.


  • Flip lid makes pouring the liquid easy
  • Stylish design
  • You may avail this with an extra lid
  • Double wall,vacuum-insulated design


  • It can keep beverages hot for only 12 hours

Borosil Stainless Steel Hydra Trek

Borosil is another trusted brand when it comes to a thermos bottle. The best part about this product is that it is available in fresh colors. It is available in 6 colors. It can keep the beverages hot for 20 hours and cold for 24 hours. It has a sling on the neck, which makes it easy to carry. It has a capacity of 700 ML.


  • Is equipped with copper coating for better temperature retention
  • Is available in classy colors
  • It is made of stainless steel
  • Double wall, vacuum-insulated design


  • No flip lid provided

TRANIAC Vacuum Insulated Flask

This bottle is BPA free and has a capacity of 1000 ml. It can keep the temperature of the beverages hot for 13 hours and cold for 36 hours. This variant comes with an extra lid. It has a wide opening which makes it easier to fill the liquid. It also has a sports sipper lid. It is available in matte black color.


  • Has an extra lid
  • Can keep the beverages cold for only 36 hours
  • Sporty look with rubber grip
  • Premium quality and BPA free
  • It is made of stainless steel
  • Double wall, vacuum-insulated design


  • Can keep the beverages hot for only 13 hours

Milton Glassy Flask

This is another variant from Milton which is purple in colour. It has a one year warranty and keeps the beverages hot/cold for 24 hours. It is made of stainless steel. the lid provided with this thermos bottle can also be used a cup. It has a flip cover and a wide opening, making it easier to fill the beverages. It has a capacity of 1000 ml.


  • Flip lid makes pouring the liquid easy
  • Comes with a cover making it easy to carry
  • It is made of stainless steel
  • Double wall, vacuum-insulated design


  • It is available in single size

Cello Swift Steel Flask

Cello makes this thermos bottle. It is a very known and trusted brand. This variant is available in three different colors and six different sizes. It can maintain the temperature of hot/cold beverages for up to 24 hours. It is made of 18/8 stainless steel grade quality.


  • Maintains temperature of liquid for 24 hours
  • Is available in different sizes and colours
  • It is made of stainless steel
  • Double wall, vacuum-insulated design


  • Simple design
  • No cover available

UNIGEAR Premium Vacuum Insulated Bottle

This bottle is available in black color and has a capacity of 500 ml. It is very stylish and looks elegant. It can keep water cold for 24 hours and warm for 12 hours. This bottle has a wide opening and is made with 18/8 stainless steel. It is lightweight and the cap is BPA free.


  • Stylish look
  • Economical
  • It is made of stainless steel
  • Double wall, vacuum-insulated design


  • Can retain hot temperature for only 12 hours

Borosil Stainless Steel TRANS BOLT

This is another famous variant from Borosil. It is available in 2 colors and has a capacity of 750 ml. it is available in different sizes. It has a condensation-free exterior and is BPA free and rust-free. It has a one year warranty on manufacturer defects. It maintains the temperature of hot/cold beverages for 24 hours.


  • Stylish look
  • It is made of stainless steel
  • Double wall, vacuum-insulated design with copper coating


  • Simple design with no flip lid

Milton Astir Thermosteel Water Bottle

This is another variant from one of the best brands in thermosteel bottles. It has a sporty look and has a narrow mouth for an easy sip. It is made of stainless steel. It can maintain the temperature of the beverages hot/ cold for 4-6 hours. It is available in different colors and sizes.


  • Made by very famous Milton brand
  • Sporty look
  • It is made of stainless steel
  • Double wall, insulated design


  • Can keep liquid hot/ cold for 4-6 hours

How to choose a thermos bottle?


The thermosteel vacuum bottles are available in 500 ml, 750 ml, 1 liter, 1.5 liters and 2 liters. We can choose one of the quantities available. The more capacity, the more the bottle’s weight, which makes it difficult to carry.


Nowadays, thermo-steel bottles are available in different shapes. You can go with any available new looks. Various brands are now opting for the production of thermos bottles of multiple shapes. This competition is leading to the creation of stylish patterns. 


The opening of the bottle is known as bore or orifice. The bore can be broad or narrow. The opening should be of a diameter so that you can easily put ice cubes in it. The opening also impacts the bottle washing. A bottle cleaning brush should easily enter through the opening of your bottle. But at the same time, it shouldn’t be too large as it will easily lead the heat to escape when the cap is opened. Wide opening lid with a push-in or flip function to take drinks is the best one. Such an opening also helps not to spill liquid while pouring it in a cup.


Build material makes a difference in thermos bottle efficiency. The material used can be stainless steel, copper, or glass. Comparatively, copper is better at heat retention, so prefer a bottle with a copper coating. The outer body should be rust-free, sweat-free, and no fingerprints while holding the bottle. 

BPA free

This feature is often overlooked while choosing 10 Best Thermos bottle in India 2020. BPA stands for Bisphenol A. It works as an artificial estrogen and mimics the human body’s hormones. BPA is often present in the production material. BPA is dangerous for the human body as it affects the neurological, immune, and cardiovascular systems. This proves to be very dangerous for pregnant women and children. Always look out for bottles with a BPA free label on them. It protects us and helps us improve hygiene. 


Before ordering a thermos bottle, check the product’s warranty. Find out if the warranty is issued after obtaining the product. We can claim the warranty over production defects and leakages. The warranty does not cover physical damage.


Previously thermos was made in only silver color. But now it’s available in a variety of colors such as blue, green, red, etc. You can also find multicolor thermos bottles that are very appealing. Since color choice varies from person to person, we leave it on the individual.


You may find different accessories with the thermosteel vacuum bottle. Most of the containers come with a cover that makes it easy to handle even if you don’t have a bag with you. A hanging hook is available with some of the bottles. It’s always better to have these accessories.


Upon shortlisting the thermosteel bottle, please read online reviews. If the comments are positive, you can undoubtedly go with the product.

Working of a thermos bottle

The operation of a thermos bottle is based on the basic principle of heat transfer. The heat will be passed between two bodies of varying temperatures until they reach the same temperature called thermal equilibrium. When you put a cup of hot tea in contact with ice, the temperature of a cup of tea will decrease, and the temperature of the ice will increase. The ice starts melting, and the tea comes at a lower temperature. It ends when they’re at the same temperature. 

Heat can be transferred by three methods of conduction, convection, and radiation. 




Heat transferred through direct contact

Heat transferred through the motion of matter

Heat transferred through electromagnetic waves

Thermos bottles operate on the basic idea of making a vacuum between the drinks and the surrounding area. The vacuum prevents heat transfer by conduction and convection. Thus, heat transfer is only possible through radiation. The outer and inner body of the thermo-steel bottle is separated by two layers of glass or stainless steel with a vacuum placed in between. So the drink is isolated from the room temperature and thus prevents the transfer of heat. Generally, the outer body is kept shiny so that the reflection further helps to retain heat.

Before the first use

After you buy a bottle from 10 Best Thermosteel bottle in India 2020, unbox and check that every part of it is present. Hold your warranty card secure with you. Remove any packaging that is used to cover the container. Now add the hot boiling water to the bottle, rinse it thoroughly, and throw it away. Repeat for 2-3 times. This will help you to maintain hygiene.

Advantages of a thermos bottle


The thermos bottle, because of its size, shape, and color, makes it look attractive. They can be carried with you wherever you go. This helps you to get hydrated. If you’re planning to take some hot and cold drinks, you can take them in the thermos bottle. That makes you refreshed!

Able to handle both hot and cold storage

You can store any kind of hot and cold storage in the thermos bottle. Just make sure you have cleaned the bottle and pre-conditioned it before. Top brands claim to keep hot and cold drinks at the same temperature for 24 hours! So be it juice or broth, you can keep it in the bottle and retain the same temperature. 

No leakage

Once locked, the thermos bottle does not allow even air to pass through it. This is 100% leak-free so that we can be sure of it. There will be no leakage of any liquid, even if you keep it upside down for hours! We can put the thermosteel bottle in our bags, even between books and files.


The thermos bottle made of stainless steel is unbreakable. Stainless steel is used instead of glass to create a layer of vacuum between them.

Who can use the thermos bottle?


Students mainly use Thermost bottles. If you are in your lectures and feel the urge to drink water, a thermos bottle can help you. It’s easy to carry milk or juice. The container is leak-proof, making it easy to carry in your bag, too. Even if you don’t have a separate compartment, you can be tension-free and keep it in between you books.


You can easily place the thermos bottle on your desk. A desk job requires you to be alert, and sometimes it’s hard to leave your desk. You can store cold or hot drinks that can help you relax. This might keep you hydrated. Several covers are also available nowadays, which makes it easy to carry in your office. 


Drinking hot water has a lot of advantages. It is instrumental when you have a sore or an infectious throat. It is useful for the weight loss program and proper digestion. This increases blood circulation and strengthens the nervous system. You may also look out for other kitchen applainces like Water purifier, Electric Kettle, Egg boiler, and Kitchen weighing scale which may further help you to have a healthy routine.

FAQ related to the thermos bottle

The thermos bottle is leaking

If the bottle leaks from the very first use, this is certainly a manufacturing defect. You can claim the warranty by using the warranty card provided to you. But make sure you’re closing your lid correctly. The rubber on the lid is fixed correctly. If water leaks after some days of use, this is mainly due to the rubber inside the lid.

The thermos bottle is not working

This case is most noticeable after the thermos bottle took physical damage. Physical damage causes air to flow in the tank, allowing heat transfer. Check out the cap of the bottle; if the rubber is damaged, change it. The lid of a few thermos bottles is also available in the shops. You can replace the cap if physically damaged.

The milk stored in the thermos bottle gets spoiled

Keep your thermos clean. You can take any of the above steps to clean up. The spoiled milk may deposit near the rubber rim of the thermos container, which may spoil the fresh milk. When unused, keep the thermos bottle open. Using cow’s milk can help you store milk longer. You can add some milk water, which makes a difference. The best way to deal is to bring hot water to the thermosteel bottle and add milk powder whenever needed. 

The thermos bottle is stinking

You may have used milk or any other drink, and might not have washed the bottle after it has been used. The bacteria could be left in the bottle, causing a foul smell. Clean the bottle with any of the above methods. Place 8-10 cloves in the thermos bottle and close the lid. Keep the cloves in it overnight. Throw them away the next day and wash the bottle thoroughly with hot water. 

Do not close the lid of the bottle. Fill the bottle with water and keep it in your cupboard. If you keep an empty bottle with a closed lid, the chances are that it will stink. You can fill the bottle with newspaper or tissue paper and keep it overnight. Throw away the paper after 8-10 hours. Clean with liquid soap and rinse with water.

Tips for using a thermos bottle

After you chose a thermos from 10 Best Thermos bottles in India 2020, follow the below steps to get better results.

Pre-condition the thermos bottle before use

Pre-conditioning the thermos bottle means matching the temperature of the bottle and the beverage. The simple physics behind this is the heat transfer between two materials of different temperatures. The higher the difference between the walls and the drink, the higher the heat transfer.

Before using the thermos bottle to store hot drinks, place a bowl of hot boiling water, and close the lid for 2 minutes. The inner walls of the thermo-steel bottle get hot because of the steam. This is a method that saves water. If you want to save time, fill hot boiling water till the brim. Use this water after 1 minute to wash other utensils. Put the hot drink in the thermosteel bottle and close the lid. With this method, a hot drink can be hot for a lot more time.

Before using the thermos bottle to store cold beverages, add 7-8 ice cubes. Stir the bottle so that ice touches every part of the inner body. Keep the ice cubes for 2 minutes to cool the body. Now, throw them away. Add the drinks and close the lid. This method keeps the cold drinks cooler for a longer time.

Do not fill the liquid upto the brim

Please leave a half-inch gap between the edge and the liquid The three methods of heat transfer are conduction, convection, and radiation. Thermos bottle walls are covered by a vacuum between inner and outer glass. The thermos bottle top, however, uses rubber, not a glass wall. When the liquid comes into contact with the top, it can transfer heat by convection. The above tip can help the liquid remain cool/hot for much longer. 

Try to keep the thermos bottle filled

Buy a thermos bottle according to the requirement. Try to keep the bottle till half-inch below the brim. The more empty the bottle is, the more the air is accumulated in the container. More air contributes to heat transfer. If we are using a thermos bottle for an individual, we should buy a thermos bottle of 500 ml. We should buy a thermos bottle with large amounts only if you are buying it for our family. Seek to use all the bottle liquid at once, as leaving the bottle half-filled neutralizes the temperature.

How to clean a thermos bottle?

This post is not just about 10 Best Thermos bottles in India 2020, but also about cleaning the Thermos bottle. For cleaning the bottle, you can follow any of the below-mentioned steps:

Cleaning with lemon

  1. Wash the lemon thoroughly. Cut 2-3 lemons and squeeze them in the bottle. 
  2. You can also put the skin in the bottle.
  3. Add hot boiling water in the bottle till 3/4th of its capacity.
  4. Close the lid and shake it well.
  5. Now open the lid and keep it aside.
  6. Keep it for 6-8 hours.
  7. Throw the water and the lemon skin. 
  8. Clean again with a bottle cleaning brush and liquid soap.
  9. Rinse the bottle with regular water 

Cleaning with baking soda and vinegar

  1. Add one spoon of baking soda and half a cup of distilled white vinegar in the bottle.
  2. Now add hot boiling water in it till the brim.
  3. Do not close the lid as both white vinegar and baking soda are highly interactive.
  4. Keep it for half an hour.
  5. Throw the mixture away.
  6. Clean the bottle with the help of a bottle cleaning brush and liquid soap.
  7. Wash the lid too with liquid soap.
  8. Clean the lid by removing the rubber used as a stopper.
  9. Rinse it thoroughly with the help of running water.


  1. Don’t close the lid when the soda and vinegar are inside. Their reaction triggers pressure that could affect the operation of the thermos bottle.
  2. If you don’t have a bottle cleaning brush, you can use rice grains as a replacement. Just add a handful of rice grains to the empty bottle and shake well.
  3. Make sure that the lid is thoroughly cleaned with liquid soap, especially its rubber rim, this will help you maintain hygiene.


Prevent thermos from physical damage

The thermosteel bottle has two layers of glass that block air from coming in, creating a vacuum. If the bottle drops from a height, it cracks the glass and lets the airflow in. The bottle can no longer retain heat and stop working as we want. We should prevent it from any kind of physical damage. Physical damage is not protected under any warranty. The only option left is to use it as a simple container.

Wash the thermos bottle carefully

Do not use abrasive liquids like acids during bottle washing. Don’t use rough scrub to clean your outer body. The external body is designed to reflect the heat coming. If you use a coarse scrub, this not only causes a scratch on the body but also affects the working. Doing so won’t yield expected results. 

Do not treat the outer body under immense hot or cold temperatures

Treatment at tremendous temperature can harm glass walls used to keep the vacuum intact. Once the vacuum is lost, the bottle won’t do the same again.

Treating the outer body under extreme hot or cold conditions can ruin the bottle’s work.

The other disadvantage of doing this is that it will melt the rubber rim or the lid itself.

We suggest you buy a thermos bottle because of its ability to maintain the temperature of the beverages for 24 hours. We hope this article on 10 best Thermos bottles in India 2020 has helped you with questions regarding the thermos bottle. We will soon update a list of best thermos bottle in India 2021. If you have any further questions please do ask us in the comment section.

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