That makes sense. The mug version of Ember (https://ember.com/products/ember-mug-2 https://ember.com/products/ember-mug-2) is open on top, which seems like a fa

That makes sense. The mug version of Ember (https://ember.com/products/ember-mug-2 https://ember.com/products/ember-mug-2) is open on top, which seems like a fancy Bluetooth version of an old-school mug heater. I could see the sealed one (the "Cup") as working better though.