20 oz. (591 mL) double-wall vacuum insulated Stainless Steel straw tumbler. Includes ABS Plastic press-on lid and Polypropylene Plastic straw Designed for use with both hot and cold beverages Vacuum insulation helps keep your hot beverages warm longer and cold beverages cool longer than bottles and tumblers without vacuum insulation. Hand-wash only. Do not microwave or place in freezer