Product Benefits Through your purchase of our Limited Edition #RefillForGood bottle, Hydro Flask is contributing $100,000 of the proceeds toward the Surfrider Foundation Versatile, middle-of-the-road size TempShield™ insulation keeps beverages cold up to 24 hours and hot up to 12 hours Durable 18/8 Pro-Grade Stainless Steel construction BPA-Free and Phthalate-Free Dishwasher safe Compatible with Standard Mouth Insulated Sport Cap and Standard Mouth Stainless Steel Flex Cap Size & Dimensions 21 oz Volume 621 mL Mouth Diameter 1.91" Diameter 2.85" Height 11.1" Weight 13.6 oz Photo and Content by Hydroflask