The 20 oz. (591 mL) tumbler has vacuum insulation that helps keep hot beverages warm longer and cold beverages cold longer than bottles and tumblers without vacuum insulation. Handwash only. Do not place in the freezer or microwave. The vacuum insulated double wall tumbler includes a clear AS plastic spill-resistant slide-lock lid and has a 304 stainless steel interior and 201 stainless steel exterior. It measures 7" H x 3.38" diameter and is BPA free.