New in sealed box- Ember - Temperature Control Smart Mug² - 14 oz - Blue. Retail: $150+ tax. Designed for home or office, Ember Mug 2 Blue Edition 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 2’s built-in battery maintains your chosen drinking temperature for up to 80 minutes, or all day with the included charging coaster.