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A thermos flask, also known as a vacuum flask or Dewar flask, is an insulated vessel to keep hot liquids hot and cold liquids cold for a long time. The double-walled construction inside the flask,with a vacuum between the walls, maintains the contents’ temperature. A durable and reliable thermos flask can keep your coffee warm and iced water cool for a few hours or more.
In this post, we have shortlisted some of the best thermos flasks in India that help you carry your favorite beverages wherever you go, without having to worry about leakage or change in temperature of the beverage.
Top Picks
13 Best Thermos Flask In India 2024
1. Milton Thermosteel Flip Lid Flask
Made of 18/18 stainless steel, Miltonthermosteel flask has double-wall insulation with a capacity of 1,000ml. The flask makes the best companion to school, gym, or any sporting activity, as the copper coatingin the flask allows better heat retention and performance, maintaining the beverage’s perfect temperature for a long time.
Specifications
Weight: 700g
Sizes: 350ml, 500ml, 750ml, 1000ml
Lid style: Flip open
Pros
- BPA-free construction
- Leakproof design
- Temperature retention of up to 24 hours
- Comes with a warranty of one year
- Easy to clean
- Strong and durable
Cons
- May not be ideal for storing carbonated drinks
2. Cello Flip-Style Stainless Steel
The Cello flask is made of thermos steel technologycrafted for maximum temperature retention.The stylish and sleek thermos flask comes with a capacity to hold one liter of liquid. Designed with extra protection, the flask has reliable double-wall insulation. The flask comes in a neutral silvercolor that makes it look like a steel bottle that you can carry anywhere.
Specifications
Weight: 709g
Sizes: 350ml, 500ml, 750ml, 1000ml
Lid style: Flip open
Pros
- Rust-resistant design
- Temperature retention of up to 24 hours
- Comes with a cap that doubles as a cup
- Has removable clip-on mouth for convenient cleaning
- Durable and strong
- Has a convenient strap to carry it with ease
Cons
- May have leakage problems
3. Amazon Brand Solimo Thermal Stainless Steel Flask
Amazon stainless steel thermos flask comes with a comfortable travel pouch for easy portability. The insulated stainless steel body can maintain the temperature ofhot and cold liquids poured in it. The flask comes with a twist cap that doubles up as a cup. The double-walled construction prevents condensation on the outer surface, despite the temperature inside. The flask can be perfect for picnics or outdoor adventures.
Specifications
Weight: 500g
Sizes: 1000ml
Lid style: Push open
Pros
- Comes with an anti-drip push open lid that prevents leakage
- Cap can be used as a cup
- Push-button mechanism allows hassle-free drinking from the flask
- Durable and strong
- Has resistance against rust and corrosion
- Convenient to clean
Cons
- May be difficult to carry without a case
4. InstaCuppa Vacuum Insulated Coffee, Tea Travel Mug
InstaCuppa is a stylish and modern mug-style flask that is perfect for office-goers, fitness enthusiasts, and backpackers. Designed to fit into standard sized car cup holders, the thermos mug can be easily carried in your gym bag or backpack. The black mug comes with double-walled insulation that can keep your beverages cold for up to 12 hours and hot for up to 6 hours.
Specifications
Weight: 400g
Sizes: 350ml,470ml
Lid style: Sipper lid
Pros
- Spill-proof design
- Made of BPA-free, food-grade plastic
- Comes with a unique sipper lid that has an attached filter
- Easy to operate
- Comes with a steam outlet
- Wide mouth makes it convenient to clean
- Dishwasher-friendly
Cons
- May not be leakproof
- Cleaning the lid could be difficult
5. Frabble8 Insulated Stainless Steel Water Bottle
Made from food-grade 18/8 stainless steel (18% chromium and 8% nickel) with a thin coating of copper and double-walled vacuum, Frabble8 can retain the beverage’ temperature for 12 to 24 hours. The small thermos flask is idealfor carrying hot or cold beverages without worrying about leakage. The sport top with textured grip makes the stainless steel water bottle handy.
Specifications
Weight: 350g
Sizes: 500ml
Lid style: Twist open
Pros
- Durable, unbreakable, and scratch-resistant construction
- FDA compliant
- Leakproof and BPA-free
- Promises a sweat-free grip
- Does not interfere with the original flavors
- Easy to clean
- Comes with a removable tea infuser
Cons
- May not be suitable to carry carbonated drinks
- May not retain temperature for long
6. Unigear Premium Stainless Steel Vacuum Insulated Water Bottle
Unigearthermos flask is your perfect companionfor hiking, cycling, and other outdoor activities. Made of stainless steel, the double-wall insulation inside the flask can keep hot beverages hot up to 12 hours and cold up to 24 hours. The flask is aneco-friendly alternative to plastic bottles.
Specifications
Weight: 320g
Sizes: 500ml
Lid style: Twist open
Pros
- Rust-proof and unbreakable
- Doesn’t alter the flavors of liquid
- BPA and phthalate-free
- Wide opening makes it easy to clean
- Comes with a carrying loop for portability
- Includes a tea infuser
Cons
- May not provide insulation beyond 4 hours
7. Yacht Vacuum Insulated Hot and Cold Double-Wall Thermosteel Bottle
Yachtoffers a double-walledstainless steel bottle with vacuum insulation that can hold cold liquids up to 24 hours and hot drinks up to 12 hours. The swanky tea thermos flask with a matte finish is toxin-free and comes in various colors.
Specifications
Weight: 431g
Sizes: 500ml
Lid style: Flip open
Pros
- BPA and phthalate-free construction
- Fits easily into car bottle holders and bags
- Sweat-free design
- Leakproof bottle
- Compact and portable
- Cap can be used as a cup
- Free of odor
Cons
- Cap may not be durable
8. Shivexim Double Wall Vacuum Insulated Stainless Steel Life Flask
Made from 304 stainless steel, the Shivexim thermos flask promises heat retention up to 12 hours. The stylish and portable flask offers resistance against acid and alkaline. Itcomes in three different colors and can be used to carry hot or cold beverages to your office or the gym.
Specifications
Weight: 401g
Sizes: 450ml
Lid style: Twist open
Pros
- BPA-free design
- Unbreakable and leakproof
- Comes with a stainless steel tea infuser
- Has wide round mouth for easy cleaning
- Comes with a non-slip base
- Strong and durable construction
- Convenient to clean
Cons
- May not have effective heat retention
9. Orpio Stainless Steel Vacuum Insulated Tea and Coffee Mug
Designed to carry hot and cold beverages, Orpiois the best thermos flask in India. It is made of high-quality stainless steel and has a vacuum-sealed cap that promises heat retention of 6 to 12 hours. You can carry your drinks in style,whether you’re going on a trip, to the gym, or the office.
Specifications
Weight: 290g
Sizes: 240ml
Lid style: Button open
Pros
- Has an ergonomic design that fits comfortably in the hands
- Strong and durable design
- Comes with a silicone stopper on the inside to prevent leakage
- Has a non-slip bottom
- Includes a tea infuser
- Has an easy one-click button open design
Cons
- May be difficult to clean
- Maybe breakable
10. Borosil Thermo Stainless Steel Flask
The hydra flask from Borosil is curated using stainless steel and comes with copper coating and double wall insulation for better heat retention. The flask is designed to keep liquids hot or cold for up to 24 hours and makes a sturdy alternative to plastic bottles. You can carry hot or cold beverages to picnics, office, school, or college in this.
Specifications
Weight: 340g
Sizes: 500ml, 700ml, 850ml
Lid style: Flip open
Pros
- Rust-proof and leakproof design
- Comes with one year warranty
- Comes with a sling for portability
- BPA and phthalate-free
- Has a drip-free sipping design
- Offers good grip with no condensation on the exterior
Cons
- May retain heat only for 6 to 8 hours
11. Atlasware Stainless Steel Vacuum Thermos Flask Bottle
Atlasware water bottle has been crafted using import quality stainless steel and has a double-walled vacuum design for retaining temperatures for long. With a one-liter capacity, the flask keeps hot drinks warm and cold beverages cool for quite some time. You can carry the flask to your gym, school, office, or onan adventure trip.
Specifications
Weight: 640g
Sizes: 1000ml
Lid style: Twist open
Pros
- Strong and durable construction
- Retains temperature for over 12 hours
- BPA and toxin-free
- Does not sweat or freeze
- Stain and odor-free
Cons
- May feel a little bulky
12. Trigal Thermos Steel Flip Lid Flask
The Trigal flask is durable with strong construction and has adouble-walled dispenser with an unbreakable food-grade stainless steel liner and outer shell. Designed to keep drinks cold or hot for hours, the silver-colored flask is elegant to carry. The flask can be ideal for picnics, hiking, and outdoor adventures.
Specifications
Weight: 730g
Sizes: 1000ml
Lid style: Push lid
Pros
- 100% leakproof and rust-resistant design
- Stain and odor-free construction
- Fits most of the car cup holders
- Has an unbreakable liner and outer shell
- Comes with a stopper for easy pouring
Cons
- May not retain heat for long
13. Kent- 16049 Stainless Steel Thermos Bottle
Kent is your reliable companion on the go. The durable double-wall stainless steel construction and vacuum insulation don’t allow the outside temperature to affect the cold or hot beverages. The silver-coloredflask is userand eco-friendly and can be carriedfor hiking and other outdoor activities.
Specifications
Weight: 382g
Sizes: 700ml
Lid style: Twist/flip-open
Pros
- Has a leak-resistant cap
- Designed with sweat and heat-proof outer body
- Comes with a one-year manufacturer warranty
- Tough and long-lasting design
- Cup can be used as a cap
Cons
- Plastic handle may not be strong
How To Choose The Best Thermos Flask?
Remember the followingpoints to shop for the best flask.
- Capacity: Thermos flasks come in varied storage capacities ranging from 350ml to 1,000ml.You can choose the storage capacity that suits your requirement.
- Leakproof: You should opt for thermos bottles that come with bodies that do not leak.
- Material:Thermos flasks are made of different materials that promise good insulation.You should choose flasks made of double-walled stainless steel as steel is corrosion and scratch-resistant.
- Ease of cleaning:Flasks are prone to tea, coffee, and other beverage stains. It is essential to clean the flask from the inside to prevent the accumulation of residues. You shouldchoose flasks that are convenient to clean and do not retain odor.
- Grip: A good thermos bottle should firmly fit in your hand. Some flasks come with silicone grip.
- Temperature retention: Opt for flasks that ensure maximum temperature retention to keep your hot beverages warm or cold beverages cool for a longer duration.
Frequently Asked Questions
1. How can the effectiveness of my thermos flask be improved?
For improving effectiveness, you need to pre-cool or pre-heat the thermos flask. Instead of directly pouring your beverage, fill the flask with hot water or cold water, subjective to the kind of liquid you wish to store. Allow it to stay there for 5 minutes and then rinse it off and pour the drink you want to carry in it.
2. What should I not put in my thermos?
You should avoid storing milk or dairy products in thermos flasks as milk tends to ferment over time,leading to pressurebuild-up, which is a risk. Similarly, dry ice should not be stored in a thermos flask for long, as pressure can build-up due to the evaporation of carbon dioxide.
3. Is it safe to use a thermos flask made of 18/18 stainless steel?
Yes. 18/18 stainless steel is composed of 18% nickel and 18% chromium. It is known to be a safe and sustainable food-grade material because of its non-reactive nature.
4. Is it better to buy a thermos with copper?
Copper is a better conductor of heat compared to stainless steel. Many companies use copper along with stainless steel to improve their performance. Copper helps in preventing the exteriors of the bottle from getting heated up.
5. How can I remove the bad smell from my flask?
Cleaning the flask with a detergent or baking soda can help remove odor. But before filling up the liquid, make sure that the bottle has dried up and doesn’t smell detergent.
6. What makes insulated bottles a better choice over glass?
Using vacuum insulated bottles is better over the glassas there can be a possible risk of breakage. Further,glass bottles are heavier to carry and are not easy to clean than flasks that are lightweight and easy to clean.
7. Is it alright to put Coca-Cola in my flask bottle?
You can safely put Coca-Cola in a stainless steel flask, however carbonated drinks in glass thermoses could cause breakage.
8. What makes a flask retain temperatures for a long time?
Flasks can keep the temperature constant longer as they come with double vacuum insulated walls. These walls prevent outside heat from getting in and keep the temperatures constant for up to 24 hours.
9. Are all vacuum flasks designed to keep temperatures constant for 24 hours?
Different flasks have different capabilities to retain temperatures for a specific period. Some can keep the temperature constant for 24 hours, while some can only keep it intact for a window of six hours.
Thermos flasks help efficiently retain the temperature of liquids stored in them. They are widely available in various shapes, sizes, and colors to suit your requirements. When choosing the best thermos flask, ensure it has sufficient capacity for your purpose, offers good grip, and can retain the temperature for long. Further, ensure it is rust and corrosion-resistant, leakproof, made of BPA-free material, easy to clean, and durable. You should also consider getting a flask with a warranty and spill-proof design.
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