16 oz. Double-wall insulated tumbler with Stainless steel outer, PP Plastic inner. Designed for both style and practicality. Either drink through the push-on slide-lock lid, or through straw (included). Stainless steel straw with silicone tip measures approx. 9.64"l. Hand wash only. Do not microwave or place in freezer. Designed for use with hot and cold beverages.