This will allow your pitstops to be much quicker and your backpack will not need to include anywhere near as much gear.

If you think about it, the majority of a flask is wasted space and not actually used for carrying liquid – it is there for the heat insulation. However, the efficiency of this insulated flask and its brushed stainless steel styling makes it one of our favourites. The leakproof café cap and the twist valve seal on its lid are so effective that you also have an insulated water bottle, soup carry-cup and a handy little ice caddy for filling with ice cubes, all wrapped up in one package. You may not have heard of ‘BPA’, but in a similar way to aluminium in camping kettles, it should be avoided when you’re looking for a thermos flask.A much simpler alternative is to pack a thermos flask containing a pre-made drink in your backpack instead. We recommend avoiding BPA where possible, and we have striven to let you know whether BPA is used in our choices of best thermos flask below. A Thermos King will last years but it’s not officially dishwasher-safe, and you’re not even meant to submerge it in water (if you do, you kill the manufacturer’s 50-year guarantee).

BPA stands for Bisphenol A, and it’s a chemical which has been used to make certain plastics and resins since the 1960s, and was commonly found in thermos flasks. The specifications state that hot drinks will stay steamy up to eight hours, whilst cold ones will be cool for 12. It has a capacity of 400ml and its leak-proof twist lid ensures that food and drink stay put, wherever you go. uk/browse/sports-and-leisure/camping-and-caravanning/flasks/c:30512/brands:thermos/" on this server. We also love the classic Sigg handle, which doubles as a lever so you can open it using a stick if your hands are cold or dirty.The steel is food-grade 18/8 so didn’t retain any smell or flavour from a tremendously strong cup of tea or coffee. It does keep hot drinks hot for 12 hours, but it’s on summer adventures that this flask really comes into its own, keeping iced drinks cold for more than 24 hours. It’s also non-magnetic, which may disappoint if you would hoped to adorn your Thermos with fridge magnets. Finally, there’s an additional loop handle on top so it can easily be attached to bags or simply carried this way. The black styling of the Klean Coat matte finish is contrasted against the stainless steel of its inner screw lid.