Keep classic brews and sparkling water refreshingly cold on the hottest days. Fits in most cup holders. Features 18/8 Stainless Steel: Made with kitchen-grade stainless steel, so they&&';;re puncture- and rust-resistant. Double-Wall Vacuum Insulation: Keeps cold drinks cold until the last sip. Dishwasher Safe. Because no one needs more work to do. No Sweat(TM) Design: Prevents condensation, keeping hands dry.