You probably wouldn't describe the scientific rigour as laboratory standard – but the tests did replicate the kind of environment you'd actually use these flasks in, either filling up your tea or coffee at the start of the day, or icing water. Composed primarily of stainless steel and also vacuum-insulated, it has a markedly wide mouth, so I’d say it’s one of the most versatile flasks I tried in terms of storing both liquids and thicker soups and stews. The cup is large enough as a serving bowl too and remains cleverly secure until the handle is locked in to prevent leakage when you’re carrying it around. We liked the push button on the lid – push it in to drink from it, push it again to lock it and seal in heat.

The result is a good looking flask that will cope well with the marks of wear and tear and regular use. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.The lid doubles up as a decent-sized cup and provides extra insulation; a handle on the side makes it easy to lug around and grip while battling the elements, but there’s no chance of leakage.

Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. 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.Out of sheer curiosity, we also filled it with ice over a weekend and discovered minimal melt at the end of it. This could be frustrating if you're looking for one to use all day long, and may put some people off. The insulation itself is ‘climate lock’ and passed our test with flying colours, keeping water close to boiling (too hot to drink! The bottle has a wide-base design, so if you’re looking for a slimline flask to fit in a rucksack’s bottle carrier we’d suggest an alternative. However, the efficiency of this insulated flask and its brushed stainless steel styling makes it one of our favourites.

But like the Stanley it is BPA-free, and it kept liquids hotter than the other Thermos flasks I tried, which were composed primarily of stainless steel. C at 8:25pm, and I already had my suspicions, because the exterior was markedly hot compared to the others – a sure sign of heat escaping. The inside of the lid is also made of high-quality and durable 304 material, bid farewell to the plastic lid on the market, which is healthy.In short, they use a double walled construction, with the air removed from between these walls, forming a vacuum. If you’re after a single cup of tea, that won’t be an issue, but it’s worth considering if you’re planning to enjoy your drink over a few hours. To help you choose which one to invest in, I tried and tested a selection of flasks that promise to keep your beverages colder and hotter for longer, measuring how much heat was retained or how cool they kept respectively over a period of 12 hours. New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging . The stainless steel loop is a classy design addition for hooking onto your finger or clipping into a bag.