Ember Mug 2 smart temperature control mug in a sleek gray finish. This 14 oz stainless steel mug features a reinforced coating and connects to your smartphone via the Ember app, allowing you to set and maintain your precise drinking temperature between 135°F and 145°F. The built-in battery offers up to 80 minutes of use on a single charge, or it can stay powered all day when placed on the included charging coaster. Designed with an IPX7 rating, it is fully submersible and safe for hand washing. Ideal for coffee and tea enthusiasts who want their beverage at the perfect temperature from the first sip to the last. Measurements: • Capacity: 14oz (414ml) No charger included. The cup has been tested and is in good working condition