Camo Dipped in your choice of Mossy Oak or Real Tree patterns, these stainless steel Polar Camel travel mugs 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 travel mug and is lead free. Polar Camels are made from 18/8 gauge stainless steel- also known as Type 304 Food Grade.