A temperature-controlled smart mug to keep your drink perfectly hot for up to 1.5 hours on a single charge, or all day with the new redesigned charging coaster. Choose your exact preferred temperature (between 50°C and 63°C). The mug is controlled by your smartphone with the Ember app to set the temperature, customize presets, receive notifications, and more. Auto Sleep: The Ember mug intelligently senses when it's active and when it's not. The mug goes to sleep when empty and wakes up when it senses motion or liquid. Hand Wash Safe: The mug is made of stainless steel and coated with an improved scratch-resistant ceramic, safe for hand washing. IPX7 waterproof and can be fully submerged up to 1 meter.