Add custom laser engraved text or images. Our 20 oz. Stainless Steel Polar Camel Pilsner features double-wall vacuum insulation with a clear lid. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers. Polar Camel Pilsner Tumblers are made from 18/8 gauge stainless steel.