Mogbea (TM)16 OZ. stainless steel coffee mug (Blue/Stainless) Superior Double-Wall Vacuum Insulation Technology Delivers Better Performance than Foam 16 oz. capacity. Opens with the click of a button. Lock/unlock feature. Features an insulated double wall. Leak and Rust proof. Ideal for hot and cold beverages. At 75F, it will retain temperatures of 140F up to 12 hours and 100F up to 24 hours. Detachable parts for easy washing. Hand washing recommended. Possesses FDA, LFGB standards Interior is made out of 18/8 High Quality Food Grade 304 Stainless Steel material.