LID: Straw Leak-proof Lid, Quarter Turn lid technology. CUPHOLDER: Our tumbler is cupholder friendly, fits in cars, and has Ergonomic handle TEMPERATURE: Cubitt tumbler technology keeps your drink cold for up to 24 hours, and hot for up to 12 hours. MADE OF: 304 stainless steel and BPA Free to protect the tumbler from oxidation, no smell, no flavor and it will not leave a metal taste or rust. Tumbler is dishwasher safe. TUMBLER: Insulated water tumbler, double wall insulation and vacuum insulation makes the Cubitt Tumbler sweat-free