20 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. Tumbler comes with a lid. Add a reusable silicone straw (10 inches long) for $1.50. Add a spill resistant slider lid for $2.50.