10 Best Thermos Flask Reviews - The Top Rated Models In 20​20

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Are you looking for a thermos to keep your food and drinks hot? Perhaps you need something sturdy that can withstand the rigours of hiking or camping?

We have narrowed down the list of the best thermos flasks in the market to share with you only the best performing flasks that will keep your drinks hot enough for your pleasure.

Best Thermos Flasks Reviews

Thermos Flasks Comparison Chart

Top 10 Best Thermos Flasks In 2020 Reviewed

The best thermos is the Vacuum-Insulated Flask with Quickstop By Isosteel. We gave it a 5/5 star rating.

With a wide range of stainless steel products, the Isosteel manufacturers have this brilliant Isosteel VA-9562DQ Duo vacuum Flask with exceptional features. When assembled, it has a height of 345mm and a diameter of 95mm.

Its filling diameter is about 4.9cm, weighs about 910g in total and holds an internal capacity of 1 litre. This thermal flask is made of 18/8 stainless steel with inner double walls that use vacuum technology.

Vacuum-Insulated Flask with Quickstop By Isosteel

The metal flask has two screw drinking cups meaning you can share a drink from the flask with a company. It boasts compartment storage which you can keep your tea or coffee bags, sweeteners or anything else.

The flask features a folding handle and a shoulder strap to enable easy moving around with it. To know which side to use for pouring, there are small markings indicated on the handle.

You can clean the flask manually for it is not dishwasher safe. It has the ability to keep your drink hot for about 24 hours. This drink flask is the greatest item to use when hiking outdoors.

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Pros
  • Has high heat retention ability
  • It is stainless steel meaning it cannot corrode
  • The favourite flask for outdoor trips
  • Has a great, classic design
  • Comes with a compartment storage
  • Wide range of usage
Cons
  • Cannot wash it in dishwasher

Second place goes to the Double Walled Stainless Steel Flask & Water Bottle By So Bottle. We gave it a 5/5 star rating.

You can never go wrong with the Stanley branded thermoses. Here is yet another one that is on top of the game. The Stanley Adventure Travel Mug has an insulated body and a thermal plastic lid to help seal the substance at the required temperature.

This small flask keeps your hot drinks temperature for three hours and iced for 20 hours. The body is 18/8 stainless steel that you are assured of no rust. Naturally, it is BPA-free for safety.

Double Walled Stainless Steel Vacuum Flask & Water Bottle By So Bottle

The small product has integrated D-rings that can be clipped to packs using the push-button lid. The lids are designed in such a way that you can open and close with one hand. This small flask is leak-proof in that when it is placed horizontally or tilted, the liquid doesn’t leak.

The lid is dishwasher safe, and it can be disassembled to enable deep cleaning. It is a car cup compatible mug. The mug holds 473ml of liquid. This kind is one of the greatest products to keep your drinks cold.

Pros
  • Durable plastic cap
  • Excellent small mug
  • Easy to open when moving
  • One-hand handling with a lid that you can easily remove
Cons
  • The screws on the cap when not carefully placed cause the drinking slot to face a different angle making the handle useless

Third place goes to the Light and Compact Flask By Thermos. We gave it a 5/5 star rating.

The classic thermos brand flask boasts a sturdy, dent-resistant stainless steel body that makes it durable and brings out the shiny finish. The flask has a double-walled vacuum insulation technology that aids in maximum heat retention ability. It keeps liquids hot for 14 hours and cold for 24 hours.

It is made of durable stainless steel and features a steel serving cup. The exteriors are cold to contact when the thermal flask has hot fluids and sweat-proof with colder fluids.

Light and Compact Flask By Thermos

This product is made light to allow a bigger interior capacity of 350ml for its size. It has an enhanced push-button stopper to ensure the pouring out of the fluids is easy.

When assembled, the flask weighs 289 grams and measures 7 by 7 by 20 centimetres. The manufacturers have given these products a 5-year-guarantee. These products make better vacum flasks to move around.

Pros
  • Appealing and lightweight
  • Guarantee to keep the drinks very hot
  • Small enough to fit in small bags
  • Doesn’t leak
Cons
  • Lacks a handle making portability a bit hard plus the surface is so smooth it is easy to slip because of no grip
  • Not dishwasher safe

Fourth place goes to the Double Wall Insulation Thermos Flask By Stanley Lgendary. We gave it a 4.5/5 star rating.

This vacuum bottle from Stanley really says style. Stanley is a company leading in the vacuum flasks manufacturing industry to create legendary technology that serves you perfectly. With this bottle, be assured of great results. You can have your drink put in and maintain its heat for a long period.

The vacuum bottle has inner double-wall insulation covered by an insulated lid to have your beverage at very high temperatures for a whole 24 hours. The body is made of grade 304 stainless steel which has superior corrosion resistance and free of Bisphenol-A (BPA) for drinks safety.

Double Wall Vacuum Insulation Flask By Stanley Lgendary

The total weight of the product when empty is 970 grams and has a one-litre capacity to serve 4 cups. The cup is 236ml doubled which is perfect because you can use the cup on the go and still works fine. The flask is made fully waterproof so you have less worry of water getting in or out.

The hot liquid flask is useful when you are hiking or camping for it carries just the right amount of hot liquids you need. It is the greatest flask for keeping coffee hot.

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Pros
  • Keeps the heat of the liquid for a considerably long period
  • Made waterproof
  • The bottom sits perfectly on a leveled base
  • Durable
  • Unwavering thermal performance
Cons
  • When the seal is loosely tied, the hours of heat retention are reduced

Fifth place goes to the Multi Purpose Stainless Steel Flask By Thermos. We gave it a 4.5/5 star rating.

Looking for a two-in-one function thermal flask for both drinks and foods? The ThermoCafé is ideal. This food + drink flask has a double-wall insulation technology where the foods and drinks are kept at either low or high temperature (hot and cold).

The cap, outer and inner body is made of steel and has an insulated steel serving cup to use. When you touch the flask containing hot coffee, the body feels cold and when the substances are cold, you are met with the sweat-proof surface all thanks to the thermos’ vacuum technology.

Multi Purpose Stainless Steel Flask

The ThermoCafé weighs 998g when assembled with a capacity of 1.8 L. The wide mouth is made big enough to fill food or drinks, serve and clean with no much stress unlike the ones that come with a small mouth, you get trouble cleaning or serving from such vessels.

The vessel comes with a dual purpose stopper to enclose the flask. For convenient portability, the family thermal flask has a folding handle and a carrying strap to achieve this.

Pros
  • It is both a thermos meal flask and a drinks flask
  • It is in the large vacuum flasks category
  • Keeps the heat of foods and drinks for long hours
  • Easy portability
  • Great flask for hot or cold drinks
  • Durable with a wide mouth
Cons
  • Not good for broth with chunky bits
  • Unreliable stopper
  • Low quality built

Sixth place goes to the Stainless King Flask. We gave it a 4.5/5 star rating. Should you choose this item, you can check the price and details on the link below.

THERMOS is known for producing high-quality material products for reliable performance. The King Flask has double walls with insulation technology that hinders the convection process to maintain the desired temperature.

Keeps drinks hot for 18 hours and cold for 24. These insulated flasks have a capacity of 470ml and have a stainless steel serving cup that encloses the lid. When assembled it has the dimensions of 3.8 by 10.2 by 2.9 centimetres and weighs 771 grams.

Stainless King Flask By Thermos

The body feels cold to contact when containing hot fluids. When the flask has ice-cold contents, the surface does not sweat due to the cold temperature. The surface is made sweat-proof to curb such situations.

You can have a drink without opening the whole stopper to let out heat or cold air. This is made possible with the twist and pour stopper. The hot water flask is best used as a coffee flask on the go.

Pros
  • Keeps drinks cold and hot for a long period of time
  • Easy portable
  • It is OK to use with consumable drinks
  • It is durable
  • Has a twist and pour stopper to make work easier
  • Cool to touch surface
  • Great product to keep the heat of your liquid for long
Cons
  • The casing and cap are easy to scratch

Seventh place goes to the Light and Compact Thermal Flask. We gave it a 4.5/5 star rating.

The perfect solution to having hot food was found when this Pioneer Vacuum flask was made. The body is made of the finest stainless steel (18/10) for a longer shine and durability. The interior is made of a shiny steel layer that acts as a heat loss prevention.

The exterior is made of steel which makes the flask impact-resistant. It has a screw-on stopper that does not let in or out the hot air by conduction process. The stopper has a leak-proof design to prevent spillage.

Light and Compact Thermal Flask By Thermos

It has a big capacity of 1 litre which allows the foods and soup to stay hot and for long over 8 hours and the cold fluids stay 1 day or even 2 days colder. For the best flask to keep foods, porridge, especially this is the perfect container to rely on to achieve this. It is also the best soup flask to hold more than a classic can of soup. This flask comes with 2 cups to have your meal or drink shareable.

Pros
  • Used for both drinks and pourable hot foods
  • Has a stylish lightweight design
  • Durable leak-proof cap design
  • It is the preferred flask
Cons
  • You must wash it manually

Eighth place goes to the ThermoCafé Stainless Steel Flask. We gave it a 4.5/5 star rating.

The ThermoCafé Stainless Steel Flask 500ml exhibits double-wall insulation technology that is responsible for great heat retention capability.

The exterior and interior walls are made of steel that is pretty durable. No matter how hot the fluids may be, the outside surface is not affected by the temperature inside. It feels perfect on contact. With colder drinks, the wall is made sweat-free.

The capacity of the popular flask is 500ml and weighs 331 grams when empty with dimensions of 24 cm in height and 9cm in diameter. This easy to use thermos flask has an insulated stainless steel serving cup that is washed manually. 

ThermoCafé Steel Flask

You cannot wash the whole flask in the dishwasher. It has a handy twist to turn stopper cap that allows you to pour out the flask’s contents. It is not a large flask from THERMOS but with this medium-capacity flask, you are sure to have your drinks cold or super-hot.

Pros
  • Keeps the heat of the drinks any day
  • Easy to use
Cons
  • These vacuum flasks lack a handle feature

Ninth place goes to the Double Wall Insulation Flask By Stanley Adventure. We gave it a 4/5 star rating. Feel free to check the price and details if you choose this item.

The use of ultra-modern double-walled vacuum technology and premium 18/8 steel on the SHO bottle provides the efficiency required. This model can keep water or any other drink super-hot for a whole 12 hours and if you intend to keep it ice cold it goes an extra 12 hours (24hours).

This bottle was invented to maintain the high standards of your drinking needs. The unique design the bottle portrays says a lot about your style which makes it usable in gyms, at home or at work, while travelling to the beach or when hiking and camping.

Double Wall Vacuum Insulation Flask By Stanley Adventure

You can put most of your drinks in this thermo flask bottle, you are not limited to any specific. Best used as cool flasks the SHO bottles come in different striking colours. The bottle is 100% leak-proof and is BPA free for health safety.

Pros
  • 12 hours hot and 24 hrs icy cold
  • Comes in stunning colors
  • All drinks worthy
  • Scratch resistant metal body and cap
  • Best water flask when it comes to sizes
  • Eco-friendly reusable bottle
  • Guarantees satisfaction
Cons
  • Not washable in dishwasher

Tenth place goes to the Vacuum Insulated Leakproof Flask By Pioneer. We gave it a 4/5 star rating. Feel free to check the price and details should you choose this item.

The genuine thermos brand flask boasts a sturdy, dent-resistant stainless steel body that makes it durable and brings out the shine. The flask has a double-walled insulation technology that aids in maximum heat retention ability.

It keeps liquids hot for 14 hours and cold for 24. It is made of durable stainless steel interior and exterior and features a stainless steel serving cup. The exteriors are cool to touch when the thermal flask has hot fluids and sweat-proof with colder fluids.

Vacuum Insulated Leakproof Flask By Pioneer

It is made light to allow a bigger interior capacity of 350ml for its size. It has an enhanced push-button stopper to ensure the pouring out of the fluids is easy.

When assembled, the flask weighs 289 grams and measures 7 by 7 by 20 centimetres. The manufacturers have given a 5-year-guarantee. These items make better coffee flasks to move around.

Pros
  • Lightweight and appealing
  • Keeps drinks very hot any day
  • Small enough to fit in a small bag
  • Doesn’t leak, so you don't have to care about that
Cons
  • Lacks a handle making portability a bit difficult plus the surface is so smooth it slips easy

A Guide To Thermos Flasks

A cool box will help maintain the temperature of your cold drinks, or keep the content of your yoghurt maker at an ideal temperature. A quality thermos will keep the content of your soup maker warm, or keep your coffee from your bean to cup coffee machine or capsule coffee machine hot.

Getting a thermos that lasts, and provides value for your money needs proper guidance, and we will provide it to you.

Benefits of having a thermos flask

Are you often travelling, hiking, camping or always busy at work? Well, these options are useful when we want our drinks and foods to be at certain temperatures on the go. Having a hot homemade meal during your lunch break at work offers the perfect benefits on to your body.

This can be achieved when you have the best flask that suits you to carry the meal. When exercising or travelling under very hot climates, you can quench your thirst with the cold drinks carried from a vacuum flask that you have.

You can preserve your foods and drinks at low temperatures when you have these flasks to give your refrigerator a break. The classic ones usually keep the substance cold for a whole day. You can also store your hot beverage or hot meal overnight to enjoy them the next day to save the time used for warming.

Factors to consider when buying a thermal flask

Naturally, the cost of an item really matters because you have to stay on a budget. Therefore, you need to look for the flask that is within your budget and performs the task effectively.

If you are low on the budget, the ThermoCafé Stainless Steel Flask, 500 ml is perfect. The ThermoCafé is perfect for when you want the multipurpose flask to store foods and cold drinks. You will have both foods and drinks flask all in one saving you money.

The capacity of the flask is the second thing that you should put into consideration when buying a thermos flask. This greatly lets you have the right size of the item to suit your needs. The small ones are ideal for individual use whereas the ones with a larger capacity are usable in large groups. 

Guide To Thermos Flasks

The material used in making these flasks is also another factor to determine the durability of the flask, and how to clean the flask after use. The time the flask takes to retain the temperature is also a key factor. When you want to carry food or drinks to have them at a later time, you should look for the one that has long hours to perform that.

Most of the items on the market are designed to keep the temperature hot only and others can do both cold and hot food and drinks heat retention. The lid on the flask does a great job of sealing to determine the heat retention time.

Other features like the handles on the flasks and how you carry the thermos flasks determine how to hold the flasks for efficiency performance. Getting the flask that will give you the best results while using is key.

Thermos Flasks FAQs

Q: For the fluid small flasks, can you directly drink from them?

A: Not all the drinks flasks available in the market have the direct drink design, some just have the pour option only. So, before you buy the flask, check if it has either options or one.

Q: Do the flasks leak when placed horizontally?

A: The most available flasks have a tight silicone seal that prevents spilling. How careful you close the flask determines the leakage.

Q: What is the duration of the flasks?

A: The material of the flask really plays a big role in the durability of the product. The steel flasks tend to last longer to serve you more.

About the Author Catherine Wheeler

Hey, I'm Cath :) Iv'e got two beautiful young girls who mean the world to me. I used to be a head chef over at my local restaurant but I gave that up to look after my girls. I decided to put my culinary experience to use here by bringing that wealth of kitchen related knowledge and sharing it with you guys.