Custom design on a 30 ounce insulated tumbler to your design. We can do the design work and will send you an electronic proof before making the product.  30 oz. Stainless Steel Polar Camel Tumblers 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 Camels are made from 18/8 guage stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade.