The 12-ounce (355 millilitre) size is perfect for sparkling water, soft drinks, and good old-fashioned beer, all kept straight-from-the-cooler cold while kicking back on the boat, at camp, or wherever good times are going down. If you know the original, this one's just like it, but with a sleeker design and an updated gasket. Details 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 Design: Prevents condensation, keeping hands dry.