Come with the Ohom pad, serving a dual purpose by maintaining your beverage at the perfect drinking temperature and wirelessly charging your cell phone and earphones. Embracing environmental responsibility, the ui mugs are ceramic with a battery-free base Handcrafted of ceramic and aluminum Backed with a 10-year limited warranty Approx. 4.3"L x 3.3"W x 4.5"T Capacity, 13 oz Dishwasher safe; not for use in microwave Imported