Engraving can include an initial, graphic, year, and/or name above the logo - or we can make the logo larger and in the middle. 20 oz. Stainless Steel Polar Camel Travel Mug features double-wall vacuum insulation with a clear lid. The mug has a narrower bottom to fit most standardd cup holders. It is 2X heat & cold resistant compared to a normal travel mug. Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade.