30 oz. Stainless Steel Polar Camel Tumblers features double-wall vacuum insulation with a clear lid. 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.
Plain Stainless steel must be treated with a special coating prior to laser engraving, therefore the price for the stainless steel is slightly more to account for the coating process.