Designed for home or office, Ember Mug does more than simply keep your coffee hot. The temperature control smart mug allows you to set your preferred drinking temperature (120°F - 145°F), so you can enjoy your hot drink-just the way you like it — from the first sip to the last drop. Ember Mug built-in battery maintains your chosen drinking temperature for up to 1.5 hours, or all day with the included charging