The Ember smart mug delivers a perfectly heated beverage, always. This temperature-controlled mug keeps drinks hot from the first sip to the last. A built-in battery maintains the chosen temperature for up to 80 minutes, or all day when used with the charging coaster. With a temperature range of 120°F to 145°F, it is simple to personalize the mug using the Ember app. It even sends a notification when the drink has reached the optimal temperature.