Designed for home or office, the new Ember Mug2 does more than simply keep your coffee hot. Our smart mug allows you to set an exact drinking temperature, so your coffee is never too hot, or too cold. Ember then maintains your chosen temperature for 1.5 hours – so your hot beverage stays perfect. Built-in battery to maintain your drinking temperature. Includes new, redesigned charging coaster. 10 fl oz/295 ml. Easy to clean. Mug is safe to handwash and submersible up to 1 metre in water.