Ember Mug² Metallic Collection
These shiny 10 oz. drinking vessels use built-in batteries to actively keep your drink at exactly the temperature you want for up to an hour and a half by themselves, or all day long if you pair them with the included charging coaster. That way you never have to guess whether your morning coffee’s going to burn your lips even after sitting a while.
Temperature control is handled via the companion app, which notifies you when your drink has reached your set temp. (There’s also an LED light on the mug that lets you know the same thing.)