12 oz. Stainless Steel Polar Camel Stemless Wine Glasses feature double-wall, vacuum insulation with a clear lid. They are 2X heat and cold resistant compared to glass or plastic wine glasses. Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) – also know as Type 304 Food Grade. Not recommended for dishwashers, hand wash only. The engraved text/design will show in silver (no color).