The 32oz Klean Kanteen it is big enough to fulfill hydration needs, easy to transport to work, gym or an outdoor adventure and has incredible performance. They test is double-wall vacuum insulated bottle performance constantly and our 32oz will keep drinks hot for 24 hours and iced for 90 hours. Electropolished interior, a process that is safe and non-toxic, and rounded corners make the bottle easy to clean. The included Loop Cap helps keep the contents hot or cold, is easy to clean and leak proof. Need something smaller? Buy our Insulated 20oz here.