Stay hydrated anywhere, any time with Hydro Flask vacuum bottle. It has a double-wall insulation and a durable construction that keeps your drinks icy for up to 24 hours or hot for up to 12.1-TempShield insulation protects temperature for hours.2-Made of 18/8 pro-grade stainless steel.3-Durable, sweat-free, and slip-free.4-Includes Flex Boot.5-Lifetime warranty.