The 12 oz. RTIC Travel 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.