Stainless Steel Tumbler-Blue-Be Strong And Courageous-Josh. 1:9This tumbler, with its 18 fluid ounce capacity, features double wall insulation that effectively maintains the temperature of its contents for long periods. It comes fitted with a clear lid with a retractable cover over the sip hole, minimizing the risk of spills. The durable insulation means there is no condensation on the outside of the mug, which protects surfaces from water damage. Hand wash recommended