Keeps your drinks hotThe Ember Smart Mug² keeps your tea or coffee at the perfect temperature all day. Simply choose the temperature you want using the app, and then wait for the mug to heat up or cool down. The LED light will tell you when it's ready.Stays warm all dayThe Mug² keeps your drinks warm for up to 90 minutes - great during meetings or if your coffee break gets interrupted.You can also stand the mug on the charging coaster, where it will stay warm all day.