This tumbler lasts 24 hours cold, 12 hours hot. High grade, stainless steel 18/8 interior. Vacuum insulated double-walled stainless steel. BPA free, eco friendly. Freezer safe. Hand wash. Do not microwave. Stainless steel body, lid is made of three parts-clear as lid body+tritan slider+silicone rim. 7.9 inch h x 4.2 inch dia. capacity 28 oz.
