BRAND NEW, FACTORY SEALED! I received this as a gift (already have one & LOVE it!) so want to pass it along to someone who will love it too! Meet the world's first temperature-controlled mug, designed to keep coffee and other hot beverages at your ideal sipping temperature. Adjust the heat with Ember's mobile app – or opt for the handy preset of 135°F. The smart mug's integral battery maintains your chosen temperature for 80–90 minutes (depending on mug size). For all-day use, simply keep your mug on the charging coaster. Smart LED feature on mug and Ember's mobile app indicate when beverage is ready to enjoy. State-of-the-art mobile app also lets you adjust temperature, add customized drink presets and more. Auto Sleep function senses when to turn heating on and off. Built-in battery maintains perfect sipping temperature. Includes convenient charging coaster.