Best thermos flask 2021

Which is the best thermos flask in the UK?


The 10 best thermos flasks to buy in the UK

The top 10 list of the best thermos flasks lists various brands and prices

Review10Best compares the best thermos flasks in the UK and selects the one by Thermos as the best thermos flask. In a thermos flask buying guide, you can read more about the features of the different thermos flasks and see a recommendation on which thermos flask to buy in the UK in 2021. By considering the top list of thermos flasks, you can find the best thermos flasks and save time shopping online.

Table of contents

  1. Read the ultimate thermos flask buying guide
  2. View the thermos flask picks and see how they rank in the top list

(skip buying guide)

Best thermos flasks: A complete buying guide

All you need to know before buying a great thermos flask

Picture of a thermos flask

The best thermos flask keeps beverages hot or cold for many hours, making it a great option for commuting, taking drinks to work, camping, hiking, and much more. However, many flasks are low quality and will not maintain the optimal temperature for long, so it helps to know what to look for to ensure you get the best thermos.

Check out the buying guide below for all the information you need to know to find the best thermos flasks:

What are thermos flasks?

A thermos flask, also called a vacuum flask, is a container designed to keep beverages hot or cold for prolonged periods. The design features an interior and exterior flask, with the double insulation creating a vacuumed atmosphere that maintains the beverage’s temperature by reducing heat loss.

Why should you buy a good thermos flask?

The best thermos flasks keep drinks hot for many hours, making it a great buy for anyone that enjoys coffee, tea, and other hot beverages. It can also maintain colder temperatures in drinks, preventing them from reaching room temperature, so it’s ideal for anyone that enjoys a refreshing cold drink. Being able to keep drinks both hot and cold makes a vacuum flask a great buy for many situations, such as taking drinks to work, outdoor excursions, or even just sitting in the house.

Another picture of a thermos flask
How to choose the right thermos flask?

Here are some things to consider when looking for the best vacuum flask:

  • Size: Flasks comes volume capacities ranging from 500ml to several litres, so you’ll want to consider how liquid it holds, choosing something that meets your daily needs. A large flask is great for people that drink lots of hot drinks throughout the day, such as taking a large flash of coffee to your work, while it’s useful for sharing. Smaller flasks have lower capacity but are lighter to carry and still great for individual use.
  • Materials: While the best thermos flasks are made from metals like stainless steel, some are made from glass. Providing it has the double insulation design, glass flasks can be just as good as their metal counterparts and provide a nice view of the drink inside, although they aren’t as durable and could break if you drop it.
  • Heat Retention: Always check how long the flask retains heat for, as some are better at this than others. Cheaper flasks tend to retain heat for 2-5 hours, while the best flasks can retain heat for upwards of 12 hours, although these will cost more and may not be necessary if you’re going to drink it sooner rather than later.
What is the best kind of thermos flask in the UK?

There are several types of best-selling thermos flasks available, any of which may be ideal for your needs. This includes:

  • Dual Flask: The standard thermos flask, it keeps drinks both hot and cold for a set period. It’s a versatile option for keeping drinks hotter or cooler for longer and is available in a range of sizes, from under a litre to several litres.
  • Food Jar: This type of flask is designed to hold foods like soup, stews, and pasta. They’re much the same as dual flasks but are usually designed to hold higher volumes. It can also be used to hold liquid so is a versatile option.
  • Infuser Flasks: The perfect flask for tea-lovers, it has a compartment for holding loose tea leaves to infuse with the hot water.
…are you ready for the best picks of 2021?

Top 10 list of thermos flasks in the UK (January 2021)

The top 10 list shows how brands and their thermos flasks compare. Which thermos flask is the best?
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Top choice* TOP 1
Image of Thermos 170298 thermos flask
Thermos Flask, Stainless Steel, Duck Egg, 1.2L*
  • LxWxH: 30.5 x 13 x 9 cm
  • 5 year guarantee
  • Twist and pour stopper lets you pour without removing the stopper
Value deal* TOP 2
Image of Thermos 181109 thermos flask
Thermos ThermoCafé Stainless Steel Flask, 500 ml*
  • Insulated stainless steel serving cup and not dishwasher safe
  • Cool to the touch with hot liquids, sweat-proof with cold
  • Durable stainless steel interior and exterior
Image of Thermos 184807 thermos flask
Thermos 184807 Stainless King Food Flask, Red, 470 ml*
  • LxWxH: 9.4x9.4x14.2 cm
  • 5 year guarantee
  • Wide mouth is easy to fill, eat from and clean
Image of Thermos 081087 thermos flask
Thermos King Stainless Steel Insulated Flask 470 ml, Raspberry*
  • LxWxH: 7.6x7.6x24.4 cm
  • 5 year guarantee
  • Twist and Pour stopper lets you pour without removing the stopper
Image of Thermos 184137 thermos flask
Thermos 184137 Light and Compact Flask, Stainless Steel, 1.0 L*
  • 5 year guarantee
  • Enhanced push button stopper for easy pouring
  • Cool to the touch with hot liquids and sweat-proof with cold
Image of THERMOcafé by THERMOS 187026 thermos flask
Thermos 187026 ThermoCafé Stainless Steel Flask, Hammertone Grey, 1.0 L*
  • Dimensions (H x D): 30 x 9 cm
  • Twist and pour stopper allows you to pour without removing the stopper
  • Insulated stainless steel serving cup
Image of Thermos 101535 thermos flask
Thermos Stainless King Travel Tumbler, Red, 470 ml*
  • LxWxH: 8.3x8.3x20 cm
  • 5 year guarantee
  • Built-in tea hook easily holds tea bags and most loose leaf infusers
Image of Thermos 32180ASSTD thermos flask
Thermos Mondial Flask, 1.8 L - Black/Green/Blue*
  • 3 assorted colours (1 shipped at random)
  • Meets and exceeds EN12546-1:2000
  • Keeps hot for 12 hours and cold for 24 hours
Image of Thermos 186400 thermos flask
Thermos Direct Drink Flask, Stainless Steel, 470 ml*
  • 5 year guarantee
  • Light and compact design for easy transportation and storage featuring an easy to…
  • Cool to the touch with hot liquids, sweat-proof with cold
TOP 10
Image of Thermos 185511 thermos flask
Thermos Light and Compact Flask, Midnight Blue, 500 ml*
  • 5 year guarantee
  • Enhanced push button stopper for easy pouring
  • Cool to the touch with hot liquids, sweat-proof with cold

* Affiliate link. We participate in the Amazon Associates Program. As an Amazon Associate we earn from qualifying purchases. There are no additional costs for you. For the top 10 list we consider only products that are available on Amazon while the ranking is based on factors such as customer reviews, number of sales and keyword. It is not a thermos flask test. Last Update 2021/01/20 00:42 o'clock.