Ember temperature control smart mug White 14 oz Slight discolor on bottom from coffee use as shown • Capacity: 14 fl oz • Built-in battery to maintain your drinking temperature • Battery life: 80 minutes, or all day on included charging coaster • Ember Mug Charging Coaster2 included • Pairs with the Ember app. iOS and Android compatible • Temperature range: 120°F – 145°F • Ember Mug is safe to hand wash and submersible up to 1 meter in water • Do not microwave