A 22-oz bottle in pink built as three layers rather than two: a 304 stainless steel outer wall, a vacuum gap, and a 304 stainless steel inner wall. That vacuum is what does the insulating, and the numbers it produces are the reason to choose this over a single-wall flask. Drinks stay hot for up to 12 hours and cold for up to 24, meaning coffee poured in the morning is still hot at midday and ice put in overnight survives to the next afternoon. The outside stays dry as well, since a vacuum gap gives condensation nothing to form on. Two lids come in the box and they serve genuinely different habits. The wide mouth lid opens to a 2.16-in diameter, wide enough to drop in full-size ice cubes, fill from a tap without spilling, and get a brush inside for cleaning. The flip-up straw lid, with its included straw, is the one for drinking on the move, since it opens one-handed and needs no tipping. Either way a 360-degree sealing ring runs around the closure, so the bottle can go in a bag sideways without soaking what is around it. A handle on the side gives a real grip rather than a finger loop, which matters once 22 oz of liquid is loaded and the bottle is being carried alongside other gear while camping, hiking, cycling, or fishing. Materials are food-grade and BPA-free throughout. Overall the bottle stands 9.6 in tall on a 3-in footprint and weighs 0.9 lbs empty.