The 12 oz. RTIC Coffee Mug is stainless steel, double wall vacuum insulated. Keeps your drink hotter for longer and maintains a comfortable temperature to hold thanks to the double wall design. This is an adult sized mug for the home, office, camping, hiking and RV and fits under all popular coffee makers. The included all-new shaded splash proof lid lets you know exactly how much drink you have. The flip-top closure resists spills. The extra wide mouth allows for easy cleaning. Features & Technology Dishwasher Safe Keep lids in the top rack to prevent damage Double Wall Vacuum Insulation Maximum temperature retention & insulates hands from the cold No Sweat Exterior The outside stays dry. No need for a coaster 18/8 Stainless Steel Strong stainless steel construction Keeps Ice Longer Holds ice for up to 24 hours Keeps it Hot Works great for hot beverages Air Tight Seal Heavy duty lid seal locks in the cold Included Splash Proof Lid Flip-top lid prevents splashes