The 30 oz. Stainless Steel Polar Camel Tumbler features double-wall vacuum insulation and includes a clear lid. Designed with a narrower bottom, it fits comfortably in most standard cup holders. This tumbler provides 2X the heat and cold resistance of a regular tumbler, ensuring your drinks stay at the perfect temperature. Made from 18/8-gauge stainless steel, also known as Type 304 Food Grade, it offers durability and safety for all your beverages.