Designed to last a lifetime, these simple bottles have kept people hydrated and happy for years. Klean Kanteen’s vacuum insulated Classic is the solution for both cold and hot beverages on the go.. This iconic bottle is proof that reusables never go out of style.. Features:. Climate Lock™ double-wall vacuum insulation keeps contents hot for up to 20 hours or cold for up to 50 hours.. 18/8 food-grade stainless steel and electropolished interiors don’t retain or impart flavours.. Opening fits ice, easy filling and pouring.. Made from safe, durable, high quality materials.. 592ml (20 US fl oz).