Designed for home or office, this temperature control Ember Mug² does more than simply keep your coffee hot. It allows you to set an exact drinking temperature, so your coffee is never too hot or too cold. Ember maintains your chosen temp for 1.5 hours so your beverage stays perfect to sip. Its sleek and modern design looks great in any setting. The temperature control smart charging coaster connects to your smartphone via Bluetooth to allow you to set your perfect temperature between 120°F - 145°F range. It also makes for a stylish and convenient travel mug. Set temperature of your drink and keep it at that temperature for hours with this ember temperature control smart mug.