The best insulated bottles in the UK 2023

To keep your drinks warm or cool, there is nothing better than an insulated bottle. There are some for the office, the school, the outings in the open air or just for the house. In addition to the design, the choice will have to be made on the volume and the maintenance of the temperature. Our comparison of the best insulated bottles will surely help you find the ideal model.

720°DGREE MilkyBottle 1

Best value for money

720°DGREE MilkyBottle

The best insulated bottle

30% more compact than traditional bottles, the 720°DGREE MilkyBottle fits easily into a bag. Its double-walled design ensures the preservation of hot or cold drinks.

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Available in 4 sizes, 350 to 1,000 mL, the 720°DGREE MilkyBottle is compact. Its ultra-efficient double-wall technology makes it easy to handle. It is even more elegant and durable. Made of 18/8 stainless steel, this model is also lightweight. Note that this insulated bottle is BPA, BPS and phthalate free.

With KeepDGREE technology, the 720°DGREE MilkyBottle can keep your drinks hot for 12 hours or cool for 24 hours. It also has a copper coating that keeps them at the right temperature without affecting the taste.

Flintronic LEU-2788447 2

Best value for money

Flintronic LEU-2788447

The best entry-level insulated bottle

Highly regarded for its build quality, the Flintronic LEU-2788447 comes in 24 colors. Its double-wall insulation capacity, its versatility and the accessories provided are its best assets.

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The Flintronic LEU-2788447 has a narrow opening. This gives the possibility to drink directly from the bottle and keep the temperature of the drink well. The cap consists of a silicone ring, avoiding the risk of leakage. You can use it on any occasion (travel, camping, office, sport, at home...). This isothermal bottle made of stainless steel with double wall keeps your drink warm for 12 hours.

Likewise, cold drinks can be kept cool for up to 12 hours. The Flintronic LEU-2788447 is both durable and resistant to corrosion and drops. This multi-purpose bottle has a 500 mL capacity and comes with a cup holder and a cup brush.

Stanley Legendary Classic 3

Best premium value for sports

Stanley Legendary Classic

The best premium insulated bottle

The Stanley Legendary Classic thermos stands out thanks to its handle that makes it easy to hold and handle. It is equipped with a waterproof cap and an insulated lid that serves as a cup.

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Unlike the other models in this comparison, the Stanley Legendary Classic keeps your beverages hot (between 65 and 100°C) or cold for 24 to 48 hours, which is twice as long on average! It can hold all kinds of liquids such as coffee, tea, water, natural juice... It is easy to carry with its ergonomic handle at work or during your outings.

The Stanley Legendary Classic is made of a double-walled stainless steel casing which gives it its strength and resistance. This insulated bottle also has an insulated lid making it very waterproof. The latter can be used as a cup if needed. It can be cleaned by hand or in the dishwasher.

Super Sparrow S-620-Cobalt 4

Super Sparrow S-620-Cobalt

The best sports insulated bottle

The Super Sparrow S-620-Cobalt is an example of performance and modernity. Despite its minimalist design, it is still stylish. This 620 mL insulated bottle is designed for sportsmen.

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The Super Sparrow S-620-Cobalt owes its robustness to its materials of manufacture, namely 18/8 stainless steel and plastic. Its powder coating ensures a better grip. You will have a certain grainy feeling when holding it. The temperature of hot beverages is maintained for up to 12 hours while cold beverages are kept for up to 24 hours.

One hand is all it takes to open the cap for immediate hydration. In addition to the lifetime warranty, the Super Sparrow S-620-Cobalt comes with a bamboo cap, straw lid, 2 straws, cleaning brush and a neoprene carrying bag.

Buying guide • November 2023

Best isothermal bottle

Any specific needs?

The best insulated bottle

The best entry-level insulated bottle

The best premium insulated bottle

The best sports insulated bottle

Your guide : Samuel

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Comparison table of the best insulated bottles

720°DGREE MilkyBottle 5
Flintronic LEU-2788447 6
Stanley Legendary Classic 7
Super Sparrow S-620-Cobalt 8
720°DGREE MilkyBottle
Flintronic LEU-2788447
Stanley Legendary Classic
Super Sparrow S-620-Cobalt
30% more compact than traditional bottles, the 720°DGREE MilkyBottle fits easily into a bag. Its double-walled design ensures the preservation of hot or cold drinks.
Highly regarded for its build quality, the Flintronic LEU-2788447 comes in 24 colors. Its double-wall insulation capacity, its versatility and the accessories provided are its best assets.
The Stanley Legendary Classic thermos stands out thanks to its handle that makes it easy to hold and handle. It is equipped with a waterproof cap and an insulated lid that serves as a cup.
The Super Sparrow S-620-Cobalt is an example of performance and modernity. Despite its minimalist design, it is still stylish. This 620 mL insulated bottle is designed for sportsmen.
Classic model
Classic model that can be used for sports
Classic model
For sports
350 mL
500 mL
1 L
620 mL
18/8 stainless steel
Stainless steel
18/8 stainless steel
Stainless steel
Temperature maintenance

: 12 hCold

: 24 h


: 12 hCold

: 12 h


: 24 h - 45 hCold

: 24 h - 48 h


: 12 hCold

: 24 h


.7 x 6.7 x 17.1 cm

.7 x 7.9 x 7.7 cm

.7 x 9.4 x 35.8 cm

.3 x 7.3 x 24 cm

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Report an error, request the addition of a feature to the table, or suggest another product. Thank you for your kindness!

Buying guide - isothermal bottle

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How to choose your isothermal bottle

Have you always wanted an insulated bottle, but you don't really know which model to choose? Here are some tips that will surely guide you.

#1 - The material

The strength and durability

of an insulated bottle depends above all on its material, which is why it is an essential criterion. You can choose between stainless steel and glass. The former is much more resistant and solid, which allows you to use the bottle for many years. In addition, you can easily find a beautifully designed model made of this material.

Glass is also more practical and aesthetic. It allows you to see how much drink is left in the bottle, without having to open it. In any case, whether you choose a stainless steel or glass model, it would not affect the heat of the drink, since there is a vacuum between the two walls. This vacuum prevents heat transfer.

#2 - The locking system


closure system is a criterion not to be neglected. It is useless if the bottle is solid and aesthetic while it is not hermetic. There are generally three types of closure systems: with screw cap, snap-on and snap-off

. The snap-on closure system guarantees a 100% hermetic bottle. No drops will leak out when closed.

#3 - The dimensions


choice of size depends mostly on your needs. Compared to a simple water bottle, the isothermal bottle is much larger because of its double wall. You should then consider the size of your bag and the amount of beverage you plan to drink.

A 750 mL

bottle, while taking up a lot of space, is handy if you don't have easy access to hot or cold drinks. If you usually take tea with you, a 300 mL model is best. Obviously, if you drink more than 300 mL/day, you'll need a larger capacity insulated bottle.

#4 - The intended use


there are many insulated bottles on the market, you should choose based on your needs, including how you will use them. They differ in material, capacity and design

. The choice is yours! If you plan to use it to carry coffee or tea, a small capacity model would be fine. On the other hand, you'll need a larger capacity if you want to drink a good amount of hot water or cold drinks during the day.

#5 - The ability to maintain temperature


quality thermos flask is distinguished by its efficiency in maintaining temperature. In case you want to enjoy your hot beverage all day long, go for an insulated bottle with a temperature holding capacity for 12 to 24 hours. On the other hand, a lower temperature holding capacity would be sufficient if you drink the beverage within an hour.

How an isothermal bottle works

By definition, the isothermal bottle, which can also be called a thermos bottle or simply a thermos, is a type of bottle with the capacity to keep a liquid at a temperature close to the initial one. It is composed of a cap that allows it to be airtight and often of a cup.

It is quite easy to understand how an isothermal bottle works. For optimal efficiency, the most commonly used method of temperature dispersion is by thermal conduction. It is the same principle as the James Dewar's vase and the basic principle of isothermics. It consists of a bottle, generally in stainless steel, which is imprisoned in another bottle of larger size. There is therefore only a minimum of contact, thus creating the double-walled insulating system. The air between the 2 walls has been emptied, offering a better limitation of the possible thermal exchanges between the 2 bottles.

When in contact with the liquid, the inner part cools or heats up quickly. If the air, by touching the outer bottle, is likely to cool it, this will have no impact on the inner container since there is no air between the 2 bottles.

The different types of insulated bottles

Of course, you can differentiate insulated bottles by their closing system. However, this characteristic depends essentially on your tastes and on the use that you will have planned. That is why we have categorized the isothermal bottles in 2 main types, namely the classic isothermal bottle and the one more specifically designed for sportsmen.

Classic isothermal bottle

With its long shape, the classic isothermal bottle has a double-wall insulation system that allows it to maintain the temperature for several hours. It stands out for its versatility and practicality

. Easy to carry, some models are equipped with a cord. Others are equipped with a tea filter, a fruit filter and an isothermal cup. In terms of opening and closing system, you will find on the market insulated bottles with screw cap and snap-on cap.

The insulated bottle is ideal for transporting hot and cold drinks with a good capacity to maintain the temperature. Available in various capacities, you can choose between individual use and family use models.

Isothermal sports bottle


isothermal bottle for sports use stands out because of its opening system that is done by a simple pressure. You will therefore only need one hand. This type of bottle is perfectly suited for any type of physical activity: outdoor or indoor sports. Thanks to its well thought-out design, it is easy to drink directly from the neck.

Equipped with a specific cap, you won't have to worry about using it even if you are on the move. It is usually made of sturdy steel with a double-walled insulation. Its long shape makes it easy to carry. This type of model is equipped with an anti-leakage system and is often of individual format.

Isothermal bottle or mug?

Isothermal bottle

The isothermal bottle is as practical as it is easy to open. It keeps both cold and hot drinks very efficiently. It is made of stainless steel and has an easy-to-use spout. Unlike a plastic bottle, this one has a double-walled insulation and has an excellent temperature retention capacity (almost 12 hours for hot liquid and 24 hours for cold).

In some cases, it is even possible to insert ice cubes in order to obtain a very cold drink. Its remarkable watertightness, its sturdiness, its quality of design and its easy opening make it a product of choice. Note that the isothermal bottle has a larger capacity than an isothermal mug.

Isothermal mug

The isothermal mug is an excellent alternative to disposable cups. It has been designed with stainless steel, making it more solid and robust. Thus, it resists very well to shocks and falls. It has a spout that makes it easier for you to drink your drink in the best conditions.

Its double-walled insulation provides optimal heat conservation. Its biggest drawback? The coffee can become moderately bitter after several hours. Its capacity varies from 250 to 500 mL. The isothermal mug is very easy to clean.


Choose the insulated mug if you just want to take the rest of your morning coffee or tea with you. With its small capacity, it is also suitable for those who prefer to have a cup of hot beverages at hand and which do not get cold in the following minutes.

On the other hand, it is better to choose the insulated bottle if you want to take a larger quantity of water, hot or cold. Moreover, there are models equipped with a cup for a better comfort of use.

Why buy an insulated bottle?

To take your hot drink everywhere

There is nothing more reliable than the insulated bottle to take your hot drink everywhere. It can be carried in a handbag or backpack. Whether you are travelling, on your way to work, at the office or on a hike, you can take it with you and drink at any time. The insulated bottles have been designed to be compact and waterproof.

To keep your drink warm or cool for hours

The main purpose of an insulated bottle is to keep a drink at its original temperature, hot or cold. It is a must-have accessory for tea, coffee and soft drink drinkers. The external temperature has no impact on the capacity of the bottle thanks to the vacuum between the two walls.

In winter, it can keep hot chocolate, chicken broth and any other hot drink for hours. Note that some models keep the heat in for 12 hours, while others can hold it for 24 hours. In summer, it can also keep your fruit drink cool for hours.

Apart from its practicality, the biggest advantage of an insulated bottle is that it can be used anytime and anywhere. It is not an accessory that is put away as soon as winter sets in or when the heat wave is at its peak.

It is environmentally friendly

Compared to a simple plastic bottle, there is no real comparison to be made since we all know the impact of plastic on the environment. As mentioned above, the insulated bottle can be used all year round. It doesn't produce waste and is reusable at will, whether it's stainless steel or glass.

For its versatility

With an insulated bottle, you will be able to take your cold or hot drink, even a large one, with you wherever you want. It is suitable for different activities besides the classic office use. Some models are designed for sports while others are suitable for travel... This type of bottle keeps your baby's milk better while you are on the move. It is also possible to keep mulled wine in it. In short, the isothermal bottle can be used in winter as well as in summer.

For its ease of maintenance

It is not recommended to put the isothermal bottle in the dishwasher. To preserve it better and allow it to last as long as possible, prefer more ecological cleaning products. A clean sponge is enough to clean the inside. Use white vinegar to eliminate bad odours. Dry it afterwards by placing it upside down on a clean surface.

The best brands of insulated bottles

In our opinion, the best brands of insulated bottles in 2022 are :

Wilford & Sons
720 °DGREE

It is surely the most famous brand in terms of isothermal bottles. In fact, this name is now used to indicate this type of bottle. Being the originator of the product, the brand never ceases to receive praise for the quality and performance of its products.

A brand that markets products that are both practical and reliable, Wilford & Sons offers you its high quality insulated bottles. They are as easy to use as they are effective.

The Newdora brand products stand out for their ease of use. In terms of isothermal bottles, you will easily recognize them thanks to their automatic opening and closing system.

Concerned about the environment, the Qwetch brand offers durable insulated bottles. Among its wide range of articles, we find insulated meal boxes, teapots... Its insulated bottles are designed with stainless steel, a very robust and resistant material.

This German brand has been able to put forward its know-how by proposing products that are always as efficient. The isothermal bottles, in particular, undergo numerous tests before being put on the market.

What is the price for an isothermal bottle

The diagram below will help you to get an idea of the typical prices for each price range (entry-level, mid-range and high-end).

However, more expensive does not necessarily mean better.

We therefore advise you to always consult our ranking before deciding, rather than blindly relying on price ranges.

6 £ to 15 £
15 £ to 30 £
more than 30 £
Price range diagram


Use a thermos flask to pack your food.

Use a thermos to pack dishes that contain sauce or liquid meals like stew or soup. A thermos can only keep food hot or cold if it contains sauce or liquid.

You can also carry cold or liquid food in your thermos.

Chill your thermos in the refrigerator or freezer. You can also fill the thermos with ice and water. Put the lid on. Let it sit for a few minutes to cool and then pour in the water. Once the thermos has cooled, quickly add cold food or drinks (to 4°C or below) and close the lid tightly.

Clean immediately after use.

Always clean your thermos when you get home. Drinks (or food) that you forget to consume will spoil and be harder to clean after a while.

Use baking soda.

To clean the thermos bottle, you can either use only baking soda or a mixture of baking soda and vinegar. Mix 1 teaspoon of apple cider vinegar and 1 teaspoon of baking soda with warm water. Let the mixture sit in the bottle for a while. Scrub the bottle and rinse well. The solution is better than soap and water and is great for removing odors.

Use a tea bag.

If you don't have baking soda, the easiest way to clean your thermos bottle is to use tea bags. Put a tea bag in the thermos bottle and add boiling water to it. Fill the bottle and leave the mixture in the thermos overnight. Discard the mixture in the morning and the thermos will be clean and spotless.


What is the best isothermal bottle?

The best insulated bottle depends on your needs and your budget. Read our buying guide to find out which products are the best at the moment.

How to keep a drink hotter longer?

It is advisable to always pour hot water into the bottle before the hot drink of your choice. This will mainly serve to heat the walls, allowing your drink to keep its temperature close to the initial one.

Does the insulated bottle leak when it is lying down?

The current models have an anti-spill system. However, if the cap is properly closed, there is no risk of the drink leaking. Prefer screw caps, which are more watertight.

What about the life span of a stainless steel insulated bottle?

On average, an insulated stainless steel bottle has a life span of 10 years. This material has the particularity of being very resistant over time.

How do you remove limescale deposits from your insulated bottle?

Limescale, mineral and scale deposits are commonplace when you have an insulated bottle. To get rid of them, clean it with hot water and white vinegar. Let the mixture work for a few hours before rinsing and drying.


Note: Below are some of the sources we have consulted in writing this article. Links to other sites are not continuously updated. It is therefore possible that a link may not be found. Please use a search engine to find the desired information.
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March 2022 : Translation of this buying guide from our partner

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Our selection
720°DGREE MilkyBottle 9
720°DGREE MilkyBottle
Flintronic LEU-2788447 10
Flintronic LEU-2788447
Stanley Legendary Classic 11
Stanley Legendary Classic
Super Sparrow S-620-Cobalt 12
Super Sparrow S-620-Cobalt


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