Top 10 list of thermos flasks in the UK (2025)
The bestseller list compares brands and their thermos flasks. Which thermos flask is the best?
- Easy to clean, just use warm soapy water.
- Easy pour lid makes this a practical yet easy-to-use piece of your kit.
- Offers Thermos' excellent temperature retention technology.
- Easy to Clean & Maintain – Clean with mild detergent and a soft brush for…
- Perfect for Active Lifestyles – Whether you’re at the gym, office, school,…
- Premium Stainless Steel Build – Made from high-grade SS 304 stainless steel,…
- BPA free. Dimensions - 30cm x 9cm (Height x Diameter).(Diameter measured from the…
- Insulated stainless steel serving cup
- Cool to the touch with hot liquids, sweat-proof with cold
- SPECIFICATIONS – Capacity: 1L. Colour: Silver. Material: Stainless steel. Weight:…
- COMPACT – Just the right size to easily fit in handbags and backpacks to take…
- SECURE – Finished with an anti-leak lid which doubles as a cup this is the…
- Pour with Precision: The clever twist-and-pour stopper lets you serve without removing…
- Built-in Serving Cup: Enjoy your favorite beverages anywhere with the insulated stainless…
- Comfort in Every Sip: Stay cool and dry with this innovative thermos travel mug for…
- 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
- TIPS & CAREAfter each use, make sure the flask is fully dried, keep liquids…
- 100% SATISFACTIONAll our products undergo thorough inspection before being shipped…
- EASY TO CLEANWide-mouth provides easy access to clean the inner tue of the flask,…
- Practical Capacity – With a 470ml capacity, this flask offers the perfect balance…
- Leak-Proof & Convenient – The secure push-button lid with a locking catch…
- Designed for Active Lifestyles – Its sleek, compact design fits easily into…
- Tea Lover's Delight - Built-in tea hook easily holds tea bags and most leaf…
- On-the-Go Convenience - Fits most vehicle cup holders, allowing you to enjoy your…
- Easy to Handle - Cool to touch with hot liquids, sweat-proof with cold, this thermos…
- Contents stay hot for up to 12 hours and cold for up to 24 hours
- Integrated drinking cup
- Lid with storage compartment
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The 10 best thermos flasks to buy in the UK
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.
How to choose the right thermos flask in 2025?
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.