With this smart mug, you can set an exact drinking temperature, ensuring your coffee is never too hot or too cold. The Ember Mug² maintains your chosen temperature for 1.5 hours, keeping your hot beverage in perfect condition. The mug is easy to clean, safe to wash by hand, and can be submerged in water up to 1 meter. It features a built-in battery to maintain your drinking temperature and includes a new, redesigned charging coaster.