15 oz. Stainless Steel Polar Camel Mugs feature doubl-wall, vacuum insulation with a clear, slider lid. They are 2X heat and cold resistant compared to other 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.