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. Wine Glasses are BPA and lead free. Polar Camels are made from 18/8 guage stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade.