Klean Kanteen Insulated Classic 20oz (592ml) - Retro Swish The Insulated Classic 20oz (592ml) bottle is based on our classic stainless steel water bottle, combined with Climate Lock double-wall vacuum insulation, keeping drinks hot for 24 hours and iced for 63 hours! Chip-resistant Klean Coat powder coat finish is durable and safe for people and planet. One of our top-selling insulated water bottles with a streamlined narrow profile. The bottle also features a leak-proof insulated sport cap and is built tough to stand up to any activity. Enjoy your hydration, hot or cold, all day long with no temperature transfer to the outside of the bottle.