The Stainless Tumbler is Very High Quality, 20.9 oz (620 ml) size, it is 7.12" tall, 3.5" wide. Beverages remain "HOT" for 8 hours and "COLD" for 16 hours. Constructed with double wall 18/8 Stainless Steel with "Push ON" lid and swivel closure. Hand wash is recommended and not for microwaves.