There really is an App for absolutley everything now. So we've added the Heat Changing App Mug to the collection as well! This App Mug reflects your mood, wherever you may be. When you are running on empty & dying for your next cuppa, the mug imitates your mood & appears blank & shows a low battery level. Fill it with your next brew however (or just hot water!) & the heat changes the mugs image to a mug filled with Apps. Only available on Tea Mobile!!