Other useful design features to look for include a wide mouth, which makes for easier cleaning and filling (especially if you want to add ice cubes to your flask).

The best thermos flasks and insulated cups 2023 - BBC Good Food

While primarily made up of stainless steel, some parts are plastic – but it is BPA-free (an industrial chemical used in water bottles and similar that many people prefer to avoid).It’s a lightweight and portable design with a nice powder-coated finish, which makes the flask easy to hold in one hand. And if you’re concerned that the 500ml capacity will be too small, it’s worth noting that Thermos also makes a larger 900ml version.

Flask and 2 Cups - Etsy UK Flask and 2 Cups - Etsy UK

We liked the solid screw-in stopper and integrated cup, as well as the external powder finish that stays condensation-free and cool to the touch, while being resistant to scratches. Designed for gram-counting backpackers, this is an extremely lightweight flask with double walls that are 60% thinner than standard vacuum flasks. We then refilled them with water at 90°c to simulate the temperature of hot coffee and fitted the screw tops and cups. Some flasks are dishwasher safe but others should only be hand washed – every flask is different and it's best to check before you clean. The size you pick should be based on your individual needs, as well as the activities you might be doing while using it.We tested the bottle’s impressive claims of keeping hot drinks hot for 28 hours and cold drinks iced for 92 hours and it lived up to both. Each flask was subjected to two 12 hours tests: for the first, I poured water from a recently boiled kettle into the flasks, took the temperature (usually around the 92 degrees mark), and then left them for half a day. Nothing beats a hot brew on a chilly day in the hills, and the best way to keep your tea, coffee or soup steaming hot is by packing a good thermos flask in your rucksack. It’s supplied with a non-slip silicone sleeve that improves insulating performance and makes the flask very resistant to scratches and dents.

Flasks Vacuum Insulated Thermos Official Range| Thermos UK

In addition, many larger flasks incorporate ‘twist and pour’ spouts, so you can pour from the flask without having to completely remove the stopper. The result is a good looking flask that will cope well with the marks of wear and tear and regular use. The specifications state that hot drinks will stay steamy up to eight hours, whilst cold ones will be cool for 12. One of its aims is to reduce the amount of plastic going into the ocean by encouraging the use of a steel bottle, so it is proudly 100pc BPA free. The two glass-lined flasks we tested were the only flasks to fail our drop test: one shattered on the first drop, the other fell apart on the second.

None of the flasks leaked from the main body – however, some flasks can't be filled to their stated capacity without liquid coming out when you screw on the lid.

Hip Flask With Cups - Etsy UK Hip Flask With Cups - Etsy UK

The insulation itself is ‘climate lock’ and passed our test with flying colours, keeping water close to boiling (too hot to drink! Flasks come in a huge range of shapes, sizes and openings, and with varying claims as to how long they'll keep drinks hot or cold. The wide mouth means it’s also suitable for soups and smoothies to take to work, and it will certainly keep them either sufficiently cold or hot until lunchtime. Not having to remove the full cap reduces the amount of heat that escapes when using it, so liquids stay hot for longer. Having said that, our temperature test showed that long-term heat retention performance doesn’t match up to other flasks of similar capacity.It’s our kind responsibility to provide you with the most accurate review of the best and latest 2 Cup Thermos Flask available on the market. It's available in a range of colours, which is fun, from canary yellow to baby blue via three shades of pink.