12 Best Thermosteel Bottles in India

A Thermos bottle is also referred to as Vacuum flask, Dewar flask. This bottle is an insulating storage vessel that ensures your drink remains hot or cold for a prolonged duration of time.

It also allows you to carry fresh drinking water along with you anywhere and everywhere. Thus, it enables you to obtain the drink of your choice at the required temperature even while you are traveling.

Nothing like carrying a hot coffee in winters and cold refreshing drinks in summer. Thermos bottles can help you save money which you would normally spend on buying beverages.

This article provides an insight into the working of the Thermo steel bottle. It focuses on helping all first-time buyers in choosing the right thermos bottle by providing a comprehensive buyer’s guide.

This is followed by the list of the Top 12 Thermosteel Water Bottles available on Amazon, along with the links to purchase them. The last section of the article provides the answers to the most Frequently Asked Questions (FAQs) related to this topic.

Top 12 Thermos Flask in India

Product (Best Brands)Average User RatingPrice RangeBest Price
Our Choice
Our Choice
The Detoxing Thermos Bottle
Sleek and Stylish Thermos Bottle
The Travel Thermos Bottle
Stylish Yet Durable Design
Elegant Matte Finish Thermos
Best Design 
The Long-Lasting Insulator
The Unbreakable Bottle
Best Lid

Working of Thermos Bottle

A thermos or vacuum flask is a great invention that is designed to store water or beverages while retaining the temperature. This keeps the content of the bottle hot or cold over a long duration.

Sir James Dewar invented the first thermos flask in 1892, and hence it is also known as the Dewar flask or bottle. This invention was later re-designed for commercial purposes by two German glassblowers, Reinhold Burger and Albert Aschenbrenner, in 1904.

The thermos bottle consists of two vessels in the interior between which the vacuum is present. The double-wall vacuum insulation is what retains the temperature of the liquid.

The bottle is usually made with a food-grade stainless steel interior that may be accompanied by a copper or reflective coating. The outer vessel is also built using stainless steel with a powdered layer of silicon.

When hot water is poured inside the bottle, it prevents the transfer of heat by convection, conduction, or radiation. The vacuum present between the vessels acts as an insulator preventing the heat from escaping due to conduction. The bottle comes with a lid or a tight stopper that prevents heat transfer through convection. On the other hand, the copper or reflective coating reflects the heat into the liquid.

Thus, the water or beverage remains hot for a long duration. Something similar is also seen in the case of a cold drink. The tight stopper prevents heat from entering the bottle while the vacuum insulator prevents the heat from entering via conduction. It retains the temperature of the drink for hours by not allowing it to come in contact with the room temperature.

Buyer’s Guide


Warranty of any product is important as it ensures that the product is reliable and guaranteed. Hence, ensure that you choose a brand that offers the best warranty. The thermos bottle should have a warranty of 6 months to 1 year so that you don’t have to worry about spending money on manufacturing defects.


The thermos bottle should have a carabiner loop lock that makes it ideal for hiking and trekking trips, travel, and daily use. This also ensures that the bottle is spill-proof. The bottle should also have a stylish and sleek yet durable design so that it is attractive to carry around and is also long-lasting. Moreover, go for a light-weight design so that you can carry it around easily.

Heat retention

The bottle should have double-wall vacuum insulation that prevents the conduction of heat energy. The thermos bottle should also feature a reflective stainless steel coating that prevents the heat from escaping outwards. These features will retain heat for a longer period so that the drinks will remain hot or cool for up to 12-24 hours.

Design and Construction

The thermos flask should be constructed using 304 food-grade stainless steel. The interior should come with a reflective coating of copper, while the exterior should come with a powdered coating of silicon. A matte finish exterior will give it a stylish and elegant look to show off to your friends.

The bottle should have a light-weight and compact design that will help you carry it anywhere you go in the compartments of your backpack. It should also have a sturdy and durable construction that ensures that it remains long-lasting.


The thermos bottle should come with double-wall vacuum insulation. This vacuum retains the temperature of the beverage or water over a longer duration. It ensures that your favorite drink remains hot or cold up to 12 or 24 hours. This lets you carry freshwater and your favorite beverage while traveling for short trips, trekking, or even to the gym.


Thermos bottles are available in different storage capacities. The sizes range from 350 ml, 500 ml, 750 ml, or 1000 ml. Choose a bottle with a capacity as per your requirement so that you never run out of the water.

Easy to Clean

The interior of the bottle should come with a superior clean finishing that prevents odor and stain. Go for a bottle with a full mouth or adjustable opening, which allows you to clean it easily using dishwashing detergent and a soft-bristle brush. This ensures proper maintenance and hygiene of the bottle, so you are always provided with a safe, healthy, and clean drink.


The thermos bottle you buy should have a proper lid with a secure locking system. This prevents leakage of the bottle, allowing you to carry it conveniently for short trips, trekking, or hiking. A leak-proof bottle also prevents wastage of water.

Lid Type

Go for a bottle with a flip-open lid, narrow mouth, or a wide mouth lid with a cup-like cover. The narrow and flip-open lid allows you to drink directly from the bottle without worrying about spilling it. On the other hand, the wide mouth lid with the cover will enable you to pour your drink into the cup-like cover. This can be used as a mug to drink your beverage or water conveniently.

100 % Food Grade Material

Ensure that the flask or bottle is made using 100% food-grade material. Go for a bottle made using 304 food-grade stainless steel that is corrosion, BPA, and rust-free. This not only ensures durability but also makes the consumption safe and secure as it is free from toxic elements or chemicals. These materials are much safer for the environment.

12 Best Thermosteel Bottle

1. Signoraware Stainless Steel Water Bottle 

Signoraware is an ISO certified company that manufactures food-grade safe kitchen appliances. The Signoraware stainless steel water bottle is single-walled and lightweight with a stylish cap.

The bottle is non-toxic and ideal for everyday use. The bottle is safe, which can be carried to school or office and even can be used at home.

Main Features
  • The bottle is easy to carry as it is leak-proof and lightweight.
  • It comes in two sizes, 750 ml, and 1000 ml.
  • Its wide-mouth enables hassle-free washing and can also accommodate ice cubes.
  • It has a compact design that fits in most standard drink holders as well as car cup holders.
  • It easily fits in any bag.
PROS (What we liked)
  • Its stylish design makes it attractive and ideal for sports enthusiasts.
  • It is available in three colors, red, silver, and blue.
  • The bottle does not rust.
CONS (What we didn’t like)
  • It is not scratch proof.

2. Milton Thermosteel Flip Lid Flask – Our Choice

Milton Thermosteel Flip Lid Flask
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The Milton Thermosteel comes with an open fliplid that allows you to drink from conveniently with any spilling.  It is made using stainless steel that is 100% food-grade safe and rust-free, making it sturdy as well as long-lasting. Milton Thermosteel bottle is one of the best Thermosteel bottle brands in India that provide good quality products.

It also has a compact structure with a leak-proof design that allows you to carry it easily in your backpack.

Main Features
  • Available capacity options:350 ml, 500 ml, 750 ml, and 1000 ml.
  • Fabricated inside and outside in 18/8 quality stainless steel
  • It has a unique flip lid.
  • You can go for long trips with stored water or beverages as it retains the temperature for up to 24 hours.
  • The lid of the flask serves as a cup.
PROS (What we liked)
  • This bottle is safe, sturdy, and efficient at storing your beverages for more extended periods.
  • The flip lid helps you drink directly from the bottle without spilling.
  • It has a compact structure that makes it easy to carry in the side compartment of your backpack during traveling.
  • The capacity allows you to store enough water or beverage for long trips.
CONS (What we didn’t like)
  • Cleaning this bottle is difficult.
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3. Borosil Vacuum Insulated Flask Water bottle

Borosil Vacuum Insulated Flask Water Bottle keeps hot and cold drinks at the same temperature for 24 hours. It comes in earthy colors and has a semi-matte finish.

It is available in different sizes and has an insulated double wall vacuum with copper coating for maximum temperature retention.

It can be used for carrying hot and cold drinks to offices, schools, colleges, gym and at home.

Main Features
  • Stainless steel material is used along with double wall insulated vacuum and copper coating for maximum temperature retention
  • It is available in different colors and different sizes
  • This flask keeps liquid hot for up to 20 hours and cold for up to 24 hours
  • It has a specially crafted exterior that remains condensation free
  • Compact design allows easy accommodation for carrying on trips
PROS (What we liked)
  • It is a non leaching, toxin free flask for healthy drinking
  • This water bottle is easy to carry to different places in backpacks or gym bags
  • It is easy to hold and pour and comes with mouth designed for drip-free sipping
CONS (What we didn’t like)
  • No negative points observed

4. Instacuppa Thermos Bottle – The Detoxing Thermos Bottle

Instacuppa Thermos Bottle
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Instacuppa brings you a range of innovative products like this thermos flask that enables you to carry healthy drinking water anywhere and everywhere. It comes in two different sizes, each also available with infuser tubes in which you can stuff fresh fruits to give you flavored tasty water and beverages.

The bottles from Instacuppa have a powdered matte finish and are made using food-grade safe steel and plastic material. It is a durable and safe thermos bottle to go for that also provides you diversity in taste.

Main Features
  • The thermos bottle is available in two sizes:470 ml and 1000 ml, both the sizes are also available with infuser tubes.
  • It comes with a powder matte finish that does not sweat, preventing slippery bottles or dreaded stains on wood surfaces.
  • Ensures that your cold detox beverages remain cold for 24 hours and retains heat up to 12 hours.
  • The bottle is made with top quality food safe 18/8 stainless steel that is BPA free and rust-resistant.
  • It comes with a 1-year full replacement warranty.
  • Has a wide mouth opening lid for using with hot water drinks and a flip-top lid for cold drinks or fruit infusions.
PROS (What we liked)
  • The bottle is made with a vacuum-insulated double-walled design that not only retains temperature but also makes it durable.
  • You can stuff fruits in the infusion tube to taste your desired flavored water instead of the regular tasteless water.
  • Unique ultra-modern design that provides an easy grip, better insulation, and temperature retention.
  • The bottle has a wide mouth for easy filling of the bottle with beverages or plain water.
  • The flip-top lid of the bottle gives extra protection by safely locking the mouth.
  • Comes with free recipe e-book for weight loss and detox.
CONS (What we didn’t like)
  • The bottle is a bit heavy to carry around.
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5. Cello Beatle Stainless Steel Flask – Sleek and Stylish Thermos Bottle

Cello Beatle Stainless Steel Flask
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The Cello Beatle thermos bottle is fabricated inside out using food-grade stainless steel that is safe for use. It uses double-wall insulation that retains heat keeping your drink hot or cold for a long duration.

You can easily carry freshwater in this sleek and stylish bottle for trekking, gym, travel, or even for daily consumption purposes. The durable bottle is also easy to clean, so you don’t have to worry about buying a new bottle anytime soon.

Main Features
  • The thermos bottle is made using food-grade safe stainless steel.
  • It is made using thermo seal technology.
  • The capacity of the bottle is 550 ml.
  • Available in different color options: blue, yellow, red, metallic blue, silver, pink, gold, and brown.
  • Uses double-wall patented vacuum insulation technology.
  • It keeps drinks hot/cold for up to 12 hours.
  • Has a special carabiner loop lock.
PROS (What we liked)
  • Has a spill-proof, sleek, and stylish design.
  • Suitable for travel, gymming, trekking, and daily use.
  • Ensures maximum temperature retention.
  • BPA free, making it durable.
  • Wide opening makes it easy to clean.
CONS (What we didn’t like)
  • No negative points observed so far.
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6. Milton Stylish-500 Thermosteel Water Bottle– The Travel Thermos Bottle

Milton Stylish-500 Thermosteel Water Bottle
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The Milton Stylish Thermosteel bottle is the perfect bottle to show off to your friends. The double-insulated wall, along with food-grade stainless steel construction ensures storage of fresh, safe water or beverages in the required temperature over long periods. The secure lid and compact structure make it easy to travel with while preventing leakages.

Main Features
  • Capacity:500 ml.
  • Available color options: Blue, red, pink, and purple.
  • It is fabricated both inside and outside with 18/8 stainless steel.
  • Has double-wall vacuum insulation.
  • Regulates the temperature of the water or beverage for up to 24 hours.
  • Has a uniquely designed lid with a secure lock system.
  • Has a compact structure that allows you to carry it in the backpack side compartment easily.
PROS (What we liked)
  • The stainless steel bottle is corrosion, rust-resistant, and ideal for storing water over a long duration.
  • Sleek, stylish, and elegant design that you can show off at school, the gym, or even on the trails.
  • Easy to clean and maintain using a mild detergent or a dishwashing liquid and a soft-bristle brush.
  • The secure lid prevents the contents of the bottle from leaking.
CONS (What we didn’t like)
  • The durability of the product is not up to the mark
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7. Cool Monkey Thermos Water Bottle – Stylish Yet Durable Design

Cool Monkey Thermos Water Bottle
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This stylish red colour thermos bottle from Cool Monkey is double-walled which keeps drinks hot or cold for up to 8 hours. It has a leak-proof and sleek design. This thermosteel bottle has a unique carabiner loop lock which makes it easy to carry while trekking, hiking, and gymming.

Main Features
  • This thermos flask is made using high-quality stainless steel which justifies its durability
  • It has a capacity of 500ml which makes 6 cups, ideal for travelers
  • It has double-wall insulation which retains the temperature of the drink for up to 8 hours
PROS (What we liked)
  • The reflective stainless steel prevents heat from radiating outwards.
  • Has a sleek and stylish yet durable design.
  • It is lightweight which makes it simpler to carry.
CONS (What we didn’t like)
  • The colour chips off and water leaks with rough use.
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8. Frabble8 Double Wall Vacuum Insulated Water Bottle – Elegant Matte Finish Thermos

Frabble8 Double Wall Vacuum Insulated Water Bottle
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The Frabble8 double wall vacuum bottle is constructed using food-grade stainless steel with an outer body finish of silicon, giving it a matte look.

The vacuum insulation design allows you to carry your favorite hot or cold beverage and even freshwater to the gym, office, hikes, or any other trip. The light-weight and elegant matte finish thermos bottle keep the drink hot or cold for up to 12 hours.

Main Features
  • Volume capacity:500 ml.
  • It is made using high quality 18/8 double-wall stainless steel.
  • The outer body is of silicon for a softer finish.
  • The double-walled vacuum insulation design with a vacuum-seal cap keeps your drink hot/cold up to 12 hours.
  • Comes with a removable tea infuser made using 304 food-grade stainless steel.
  • It is leak-proof because of its deep groove seal technology with a BPA free silicone seal
PROS (What we liked)
  • Has a light-weight design making it easy to carry for outdoor activities, the gym, long hikes, treks, bike rides, etc.
  • Has an anti-slip cup bottom and is durable.
  • The wide mouth makes it easy to clean.
  • It is environmentally safe to use as it uses no plastic.
CONS (What we didn’t like)
  • The outer covering of the bottle started peeling off after for a while
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9. Quickshel Double Wall Vacuum Insulated Stainless Steel Water Bottle – Best Design 

Quickshel Double Wall Vacuum Insulated Stainless Steel Water Bottle
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The Quickshell Thermos flask is available in two variants, both of which looks elegant and attractive. It has an interior made using food-grade stainless steel that prevents odor and stain. This maintains the hygiene of the product, ensuring your safety.

The thermos flask has the best design, not only in appearance. It is also light-weight and compact, making it easy to carry around. Moreover, the design also allows you to drink the water or beverage comfortably using the mug and its wide mouth.

Main Features
  • This is a thermos flask with an interior made using 304-grade stainless steel.
  • Available variants: Life Black and Floral.
  • Uses advanced vacuum insulation technology.
  • Keeps the beverage hot or cold for over 6 hours up to 12 hours.
  • It is BPA free.
  • Bottle capacity: 450 ml.
  • The outer body is powder-coated.
PROS (What we liked)
  • The compact and super light-weight design allows you to carry it inside your bag.
  • It is designed to drink directly from the mug with a wide stainless steel mouth.
  • Has a super clean interior finishing that prevents odors and stains.
CONS (What we didn’t like)
  • The quality of the product was not up to the mark.
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10. Eston Premium & Exclusive Thermos Bottle – The Long-Lasting Insulator

Eston Premium & Exclusive Thermos Bottle
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The Eston Premium thermos Bottle has double-wall vacuum insulation with a stainless steel interior that keeps water or beverages hot or cold for up 10 to 12 hours.

It has a leak-proof, light-weight, and durable design that comes with a matte black body finish. Another great feature is its adjustable mouth that can fit in ice cubes along with ensuring easy pouring and cleaning.

Main Features
  • Available in two variants: Oval black and straight black.
  • The interior is made of stainless steel.
  • Double vacuum coated outside for insulation.
  • Ideal for gym, office, travel, sports, and hospital.
  • BPA free.
  • It is tested to ensure hot and cold drinks for 10 to 12 hours.
  • Matte black body finish.
PROS (What we liked)
  • Light-weight and durable design.
  • Vacuum glass liner keeps the beverage hotter, cooler, and fresher for a longer duration.
  • Has an adjustable mouth to fit in ice cubes and ensure easy pouring.
  • It is completely leak-proof.
CONS (What we didn’t like)
  • It does not keep the water or beverage hot for a long duration.
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11. Milton Tiara-900 Stainless Steel Bottle – The Unbreakable Bottle

Milton Tiara-900 Stainless Steel Bottle
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The Milton Tiara 900 Stainless Steel Bottle is the best option for a durable product.The bottle is fabricated inside out with food-grade safe stainless steel that is rust free.

Moreover, the bottle is unbreakable and leak-proof, allowing you to carry it anywhere you go. The narrow mouth enables you to drink from comfortably without spilling. The Milton bottle ensures a good quality product at a reasonable price.

Main Features
  • The interior and exterior are made using 18/8 stainless steel.
  • Has a unique leak-proof technology.
  • Has double vacuum insulated body to keep beverage hot or cold for a long duration
  • Easy to carry to work, office, gym, travel, or school.
  • Has a narrow mouth.
  • Capacity: 500 ml.
  • Color: silver.
PROS (What we liked)
  • It is unbreakable and rust-free, making it long-lasting.
  • The bottle is odor-free and 100% food-grade safe.
  • Easy to clean using a mild detergent or dish wash liquid and a small bottle brush.
  • The narrow mouth makes it easy to drink water without spilling.
  • Ensures better heat retention.
CONS (What we didn’t like)
  • No negative points observed so far.
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12. Cello Instyle Stainless Steel Flask – Best Lid

Cello Instyle Stainless Steel Flask
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The Cello In style Stainless Steel Thermos Bottle can store water and other beverages for a long duration. The product has sturdy construction with a press flip open lid that allows you to drink directly from the bottle.

The cup design cover also can be used as a mug in which you can pour your drink. Thus, it is the perfect choice to consume your favorite drink in comfort, even during outdoor activities.

Main Features
  • The interior of the thermos flask comes with a copper coating for better heat retention.
  • Comes in different capacity options: 1 liter, 350 ml, 500 ml, 750 ml.
  • Has a 100 percent insulated 18/8 stainless steel body.
  • Suitable for temperature control of hot and cold water for hours.
  • It has a press flip-open lid.
  • Available color options: Black, Silver, and Red.
PROS (What we liked)
  • The wide mouth ensures easy cleaning.
  • The unique cup design cover of the bottle can be used as a mug, allowing you to drink water or any other beverage conveniently.
  • It has a sturdy and durable construction.
  • Compact design allows you to carry it outdoors for picnics or even to the gym.
CONS (What we didn’t like)
  • After the usage for a few months, the bottle stopped retaining temperature for a prolonged time period.
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Frequently Asked Questions

1. Is stainless steel good?

Stainless steel thermos bottles are good as the reflective layer prevents the heat from radiating outwards. This enhances the heat retention of the bottle so that your drinks remain hot or cold for a longer period. Stainless steel also prevents rusting, which ensures the durability of the bottle.

2. Can I use a thermos water bottle for tea and coffee?

A thermos bottle can be used for storing your tea and coffee. The vacuum insulation will prevent the escape of heat so that the tea and coffee remain hot for a longer time period.

3. How do I clean my thermos bottle?

You need to open the lid of the thermos bottle and then clean the interior. The bottle can be cleaned using mild dishwashing detergent and a soft-bristle bottle brush. This should be done regularly to prevent odor and maintain hygiene.

4.  Is there a coating on the interior of your stainless steel bottle?

Most stainless steel bottles come with a coating of copper. This ensures heat retention for a maximum time period. Thus, your beverage remains hot or cold for hours. The interior also might have a super clean finishing to ensure that it is free from odor or stains.

5. How long can you beverage remain hot or cold in the thermos bottle?

The beverage in your thermos bottle usually remains hot or cold for up to 12 hours. However, certain thermos bottles offer heat retention for a longer time period. These bottles can keep your beverage hot or cold for up to 24 hours.

6. What does BPA free mean?

BPA stands for bisphenol A. It is a chemical that is used to make plastics and resins that are used to make containers that store food, water, or beverages. A BPA free thermos bottle means that the bottle is absolutely safe and free from this industrial chemical.

7. How can you remove stains or smell in the thermos?

Usually, you clean your thermos bottle using dishwashing detergent and a soft-bristle brush. You can also remove stains or odor from the bottle by pouring a small amount of baking soda into the bottle and then scrubbing it with the bottle brush. The bottle should then be rinsed properly with water.


Thermos bottle serves to be a true travel partner. You don’t have to stop forgetting water or tea while traveling as the bottle ensures that you are provided with fresh drinking water or any hot or cold beverage of your choice. This article hopes to help you find the right thermos bottle.

The buyer’s guide explains all the necessary factors you need to consider before making a buy. We have also provided a detailed review of the top nine thermos bottles available on Amazon. You can go for our number one choice-The Milton Thermosteel Flip Lid Flask, as it is also Amazon’s choice.

The Instacuppa Thermos Bottle is another great option as it comes with an infuser tube that allows you to get water with the flavor of your favorite fruit.

We now come to the end of the article. You can buy any of the thermos bottles in the list from the links mentioned below each of the products.

Anaida Sutherland

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