Designed for home or office, Ember Mug 2 does more than simply keep your coffee hot. The temperature control smart mug allows you to set your preferred drinking temperature (120F 145F), so you can enjoy your hot drinkjust the way you like it from the first sip to the last drop. Ember Mug 2s built-in battery maintains your chosen drinking temperature for up to 80 minutes, or all day with the included charging coaster.