TempShield double-wall vacuum insulation Flex Sip lid is leakproof when closed Made with 18/8 pro-grade stainless steel Color Last powder coat is durable & sweat-free BPA-free & dishwasher safe Designed with hot drinks in mind, this wide mouth bottle with Flex Sip lid is cup holder compatible and leakproof. This insulated, stainless steel bottle is ideal for coffee, tea, or your favorite beverage, while keeping hot drinks hot and cold drinks cold.