The 18oz CLASSIC Stainless Steel Bottle with Sport Cap from Klean Kanteen is the simple solution to keeping your water cold all day long. The Climate Lock insulation maintains the temperature of the liquid, so hot stays hot and cold stays cold. The 18/8 food grade stainless steel is tough and durable and able to withstand all kinds of wear. It’s dishwasher safe, and the taste of your drink won’t be affected by the inside finish.