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.

It’s completely leakproof, and the loop makes it easy to attach it to a pack with a carabiner or similar.It’s a simple re-design of a classic thermal coffee cup; a function it performs with class thanks to climate lock insulation. The stainless steel loop is a classy design addition for hooking onto your finger or clipping into a bag. The stainless steel outer wall of the flask is very thin and thus likely to dent more easily than others.

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. CUPS INCLUDED: This lightweight travel set includes 2 cups (inner and outer) and a small storage container, making this flask the perfect travel drink bottle. We love the convenience of the handle when it comes to portability and the bottle is a nice size for one handed sipping. Crafted from Stainless Steel, these double walled vacuum flasks with easy-open stopper will keep your drink hot or cold for hours.Our hot water was still impressively hot after six hours and refreshingly chilled after the same amount of time – cold enough that some of the ice we dropped in there was still in tact. The single cup attached to its top holds roughly as much as a small tea cup, and has a tiny handle for extra support. The 750ml capacity holds around three cups of hot coffee (or the equivalent of a chilled bottle of white wine). 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. The insulation claims to keep water cold for 32 hours, which turned out to be underselling its capability.