20 oz. ( 591 ml) Stainless Steel Polar Camel Tumblers features double-wall vacuum insulation with the best MAGNET lid on the market. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers. Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade. LASER ENGRAVED LOGO