Vacuum Insulated Stainless Steel Water Bottle

A 600 ml water bottle with a double wall of stainless steel and a vacuum between the layers, so the outside stays dry and the contents stay cold for around 24 hours or hot for around 12. The vacuum gap is what does the work: with no air to carry heat across, the bottle does not sweat onto a bag and the drink holds its temperature far longer than a single-wall flask. The mouth is wide enough to drop in ice and to reach in and clean, the lid seals against leaks for a bag, and the powder-coated outside grips dry in the hand. 18/8 food-grade steel inside, with no plastic touching the drink.

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