Nalgenes are quintessential climbing bottles—they have a large capability, are near indestructible, and have a large mouth that encourages chugging. Whilst they will not hold your water cold all day, the large opening means you can easily fill yours with ice to help keep it chilled for quite a while. https://finnyhlts.full-design.com/side-effects-of-high-alkaline-water-an-overview-60439168