Keep your drink warm. This mug is designed to ensure your beverage is always at the perfect temperature. Thanks to the self-heating function, you can enjoy your drink at 55 degrees Celsius all day long. The self-heating feature of the Muggo Volt is controlled by a built-in induction switch. When you place your cup on the coaster, the heating system automatically turns on. Volt comes with a smart coaster that serves a dual purpose. It can both heat your drink and wirelessly charge your phone quickly. A self-heating mug with a wireless charger. Since the mug is made of high-quality, food-grade ceramic, it is safe for all hot beverages. Due to the materials, it can also be easily hand-washed like any other cup you own.