Tap: convince people to stop buying plastic bottles of water. This is the bold ambition of the new start up by Samuel Rosen. The app displays nearby clean drinking water locations, from restaurants and retail stores to public water fountains, so you can refill your water bottle. It's like Google Maps for clean drinking water. The app provides profiles on each location and what it offers, such as flavored or sparkling water, and whether it comes free or at cost from a water cooler, counter service or a drinking fountain.