1. The coffee mug is vacuum double insulated. The double-walled insulation design helps beverages stay hot or cold for extended periods, allowing you to enjoy your drink at the desired temperature while protecting your hands. 2. The BPA-free plastic sliding lid features a rubber gasket for a secure, leak-resistant seal. It opens smoothly and helps prevent splashing. Closing the lid keeps the interior clean when not in use. The top includes a drinking opening that is straw-friendly. 3. The coffee mug is constructed from food-grade stainless steel. The interior lining does not retain odors or flavors and is easy to clean. The durable design ensures long-term use. 4. Multi-purpose use: This stylish travel mug is ideal for work, school, travel, commuting, and outdoor activities. Specifications: Item Name: Insulated Coffee Mug Material: Stainless Steel and BPA-Free Plastic Color: Blue, Yellow, Pink, Green, White, Sky Blue Size: 15 oz (450 ml) Package Includes: 1 x Stainless Steel Mug (other items shown in images are not included)