10 Best Thermos Flasks UK 2024 | Perfect for Hiking and Long Commutes
The Thermos brand has been around since the 1900s and continues to produce top quality, well-priced products today. There are hundreds of different flasks on the market for hot drinks, cold drinks, fizzy drinks and even food! In this article, we share with you everything you need to know when it comes to buying the best Thermos, and give you our top 10 favourite flasks from Amazon, eBay and John Lewis!
Quick List - Top Thermos Flasks
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What Is a Thermos Flask?
The Thermos flask was invented by Scottish scientist Sir James Dewar in 1892. His innovative design was born by placing one flask inside another larger flask. The two vessels are then joined at the neck and the air in between is evacuated, creating a partial-vacuum effect.
This prevents heat from escaping, keeping the liquid at the same temperature regardless of the conditions outside of the flask. Thanks to this clever innovation, we can take our drinks out and about safely in the knowledge they’ll stay hot or remain chilled for hours on end.
How to Choose a Thermos Flask in the UK ― Buying Guide
Get the Right Type of Thermos Flask for Your Requirements
Regular Thermos Flasks Keep Drinks Hot, But Can Also Ensure Cold Drinks Stay Chilled
However, there are some specific types that stay icy for hours. These flasks usually have a slim design so that they can be used as a water bottle for sports or every day. If you are a fan of smoothies, iced drinks or slushes there are cooling Thermos flasks with straws to prevent thicker liquids coming up in large clumps.
Thermos Flasks Designed to Hold Food Are Ideal for Soups, Pasta and Salad
Packing your own food saves money and can help you stick to healthy choices. However, it’s not always convenient when you want a hot meal away from home. Luckily there are Thermos flasks made specifically for food!
Thermos flasks designed for food have a wider opening than those made for drinks so you can easily get food in and out. These flasks are perfect for soup, noodles or pasta dishes and can also be used to keep foods such as fruits or salad fresh and cool outside of the fridge.
Thermos Flasks for Carbonated Drinks Stop Fizz From Escaping
Thermos flasks designed for fizzy drinks contain an airtight valve that maintains the pressure inside stopping the fizz from escaping.
Check the Thermos Flask’s Capacity to Find the Right Size
If you are looking for something for the kid’s lunchboxes, a small-sized Thermos flask that holds 350ml of liquid is ideal. Small Thermos flasks are also an ultra-portable pick for adults as they won’t take up much space in your bag or on your desk.
Large size Thermos flasks are available for when you want to transport a lot of liquid. These can hold 700ml, 1 litre, or even more, which is useful in situations where you may not have access to hot running water such as when camping or on road trips. They are also are great for sharing and taking on picnics!
The Thermal Retention Time Let’s You Know How Long the Flask Keeps Contents Hot and/or Cold
Some designs are better at keeping contents warm while others excel at keeping them cool. Always check the approximate thermal retention time, especially if you require the retention for lengthy or all-day usage.
Consider the Materials Your Flask Is Made From for Durability and Insulation
Not quite as insulating as glass or steel, plastics are sometimes used for the outer casing of the flask, so should preferably be paired with a steel inner. Waterproof and shatterproof, plastic won’t tarnish and defends against knocks and bumps.
Different Lids Provide Different Functions
Choose Twist and Pour Lids for Easy Pouring and Their Ability to Double as Cups
The most common type you will find on flasks is the twist and pour lid. These lids have a wide opening with a screw stopper that you can remove partially to pour contents into a cup or remove fully to drink directly from the flask.
Look for twist and pour lids that come with an extra screw-top lid that can be used as a cup or bowl if you know you won’t have access to kitchenware.
DrinkLock and Direct-Pour Lids Are a Great Choice for Hot Drinks
DrinkLock lids are designed primarily for hot drinks such as teas or coffees. The lid can be clicked open and closed easily with one hand, and locks in place securely to avoid spills. These lids also come with a handy tea hook on the bottom to keep your tea bag suspended inside the flask.
Direct-pour lids flip open to reveal a deep well opening with a small hole that helps to control the flow of liquids. These are ideal for sipping hot drinks straight from the flask as you don’t have to worry about too much rushing out at once and burning your mouth.
Twist-Off Soft Touch Lids and Straws Help You Enjoy Cold Drinks
Some flasks for cold drinks come with a removable straw. This prevents thicker drinks such as smoothies or milkshakes clumping, protect sensitive teeth from iced drinks and are a fun way to encourage kids to drink more water.
Top 10 Best Thermos Flasks in the UK
Products | Image | Click to purchase | Key features | |
|---|---|---|---|---|
1 | Thermos Stainless King Travel Tumbler | | The Best Selling Thermos Travel Cup Flask | |
2 | Thermos Hercules Flask | | The Most Durable and Heat Retentive Thermos Flask | |
3 | Thermos King Food Flask | | Best Thermos Flask for Food | |
4 | Thermos ThermoCafé Stainless Steel Flask | | Best Thermos Flask for Daily Use | |
5 | Thermos FUNtainer Straw Bottle | | Best Choice Thermos Flask for Kids | |
6 | Thermos Super Light Direct Drink Flask | | Best Small Size Thermos Flask | |
7 | Thermos Carbonated Fizzy Drinks Bottle | | A Thermos Flask That Stops Fizzy Drinks Going Flat | |
8 | Thermos Super Light Travel Tumbler | | A Portable, Slim and Lightweight Flask | |
9 | Thermos Stainless King Cold Cup | | Best Choice for Smoothies and Iced Drinks | |
10 | Thermos Mondial Flask | | Best Thermos Flask for Picnics |
The Best Selling Thermos Travel Cup Flask
The 470 ml tumbler will fit easily inside most cup holders and the leakproof DrinkLock sealing lid can be clicked open and closed with one hand. So, unlike a disposable takeaway cup, you won’t have to worry about hitting a speed bump and it spilling all over your lap.
The Most Durable and Heat Retentive Thermos Flask
The Thermos Hercules has unrivalled heat retention and will keep drinks either hot or cold for up to 24 hours. With a large 1 litre capacity, fill it up in the morning to enjoy hot drinks throughout the day.
Best Thermos Flask for Food
This flask has incredible thermal retention, keeping food hot for up to 14 hours and cold for 24 hours. The insulated twist top lid can be used as a handy bowl, although there is no spoon or fork included so don’t forget to bring your cutlery!
Best Thermos Flask for Daily Use
This flask keeps liquids hot for up to 8 hours and cold for 24 hours making it suitable for school, work, hiking and much more. Drink directly from the bottle or use the twist and pour lid to decant your beverage into the cup in the lid!
Best Choice Thermos Flask for Kids
This flask is available in metallic pink and blue or with a choice of either a fun floral or football design. The lid flips open to reveal a pop-up straw for easy hydration with a stopper seal to prevent choking.
Best Small Size Thermos Flask
The flip open lid with direct drink spout controls the flow of liquids to prevent your drink spilling or pouring out too quickly. An especially useful feature for those who like to consume hot drinks on the go, this flask also lets you confidently take a sip of hot tea or coffee without burning your mouth.
A Thermos Flask That Stops Fizzy Drinks Going Flat
The twist-off soft touch lid with silicone drinking spout helps maintain carbonation and is easy and comfortable to drink from. The design of this flask also makes it suitable for sports and isotonic drinks.
A Portable, Slim and Lightweight Flask
When the stopper is removed, the lid has a wide opening that lets you drink from any angle. Ready to take anywhere with you, the sleek design of the flask allows it to slide neatly inside a tote bag or into your backpack’s side pocket.
Best Choice for Smoothies and Iced Drinks
The removable straw lets you sip on the go, prevents clumps and protects sensitive teeth from icy drinks. Be aware that this flask is not suitable for use with hot liquids, so stick to cold beverages to avoid burning the roof of your mouth!
Best Thermos Flask for Picnics
The inside of this flask is made of glass to keep drinks insulated without leaving a metallic taste. However, this does make it more prone to breaking than other Thermos flasks so you should try to avoid hard knocks or heavy impact especially when empty.
Looking for Other Ways to Keep Hydrated and Full on the Go?
Whether you're camping, travelling or commuting to work, we have compiled below the best top 10 lunchboxes, stainless steel water bottles and reusable coffee cups to help you keep hydrated and full on the go!
Summary
Author: Wren Mann
Top 5 Thermos Flasks
No. 1: Thermos｜Stainless King Travel Tumbler
No. 2: Thermos｜Hercules Flask
No. 3: Thermos｜King Food Flask
No. 4: Thermos｜ThermoCafé Stainless Steel Flask
No. 5: Thermos｜FUNtainer Straw Bottle
View Full RankingThe descriptions of each product are referenced from content available on manufacturer, brand, and e-commerce sites.