3L / 3000ml Stainless Steel Airpot Air Pot Flask Hot Cold Tea Coffee Pump Action Vacuum Flask by Denny International® (Set of 1 Airpot)

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Some bottles went a step further, like the Purifyou Premium glass bottle that has a rubber gasket and metal plug to ensure that your water doesn't touch plastic.

Our NeverLeak™ technology features a unique 3-position lid that rotates open for easy sipping, then locks tight when closed. 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.With a large pump-action button on the lid, contents are dispensed from the spout with no need for lifting and pouring.

One of the highest scoring bottles in many other regards—the Klean Kanteen TKWide --is quick to hydrate with a two-handed half twist, but it leaked a decent amount during controlled testing (although none was noticed during field testing). Maths isn't my greatest skill but to make it simple, say electricity is 60p/kWh and a kettle uses 3kWh. Our Editors' Choice, the Hydro Flask Wide Mouth with Straw, is also a sleek flip straw bottle with a comfortable carry loop that makes it easy to tote around. The insulated bottles saw a modest temperature increase, while some of the non-insulated contenders reached temperatures 40 degrees above the ambient air temperature. Other stainless steel bottles, like the Iron Flask Insulated, received a slightly lower score due to thinner material construction resulting in slightly less durability.If you find a hydration bladder is a good fit for your activities, it's hard to beat the Gregory Hydro 3D. Both the Standard Mouth and Wide Mouth options have plenty of room for loading in ice and come with the easy-carry Flex Cap. The durable plastic cap has an ergonomic carry handle with a carabiner-like clip, making it easy to lug around. The Speedflask also has an easy push-button flip cap but was taken down a notch because it did not prove to be leakproof during that portion of the test.