4-in-1 Versatility: It's like having four different types of tumblers within one! Use it as a skinny can cooler, standard can cooler, tumbler, or tumbler with handle. Double-Walled Insulation: Keeps beverages hot for up to 8 hours and cold for up to 12 hours. Construction: Constructed from durable 304 18/8 stainless steel, ensuring longevity and resistance to rust. Leak-Proof Lid: Equipped with a clear, BPA-free lid that features a secure seal, preventing spills and allowing you to see inside. Easy to Clean: Smooth interior surfaces prevent hookah stains and odors, ensuring effortless cleaning. Hand wash recommended, but can also be placed on the top rack of a dishwasher. Best of all – you can even customize the mug, making it the perfect gift for friends and family. Fit for 12 oz Beer Bottle, 12 oz Standard Can and 12 oz Slim Can Plastic Straw, Stainless Steel Straw, Rubber Bottom