Pinelopi Papadimitraki calls her invention "Detext." The cloud-shaped cushion makes it physically difficult to look down at your phone to fall into a fountain. She writes at Core77:
Detext is a wearable device that attempts to situate one's focus to their immediate surroundings and their own body by disrupting the problematic habit of using handheld devices while on the move.
So it makes you look up at the world around you. And it's stylish, too.