30 oz. Stainless Steel Polar Camel Tumblers feature double-wall, vacuum insulation with a black, flip top lid. They are 2X heat and cold resistant compared to glass or plastic glasses. Wine Tumblers are BPA and lead free. Custom designs available. Choice of over 45 designs. Narrow bottom to fit most cup holders. Handwash only. Easy to clean. Double sided engraving options available.