16 oz. Stainless Steel Polar Camel Stemless Tumblers feature double-wall, vacuum insulation with a clear lid. They are 2X heat and cold resistant compared to other tumblers. Polar Camels are made from 18/8 guage stainless steel (18% chromium/8% nickel) – also known as Type 304 Food Grade. Locally engraved with our classic Idaho Antler design.