The other day a friend had a great idea. It was based on the premise of drinking a soda in a way that leaves the top of the can still intact. Then you proceed to re-fill the can with tap water. The can looks like it's still closed, but the pull tab is a little deformed, slightly less full than it was with soda, and the can is easily deformed without carbonation. Making this a cool way to fool an fairly unobservant/inebriated friend. Instructions. 1. Pop the tab just enough to let the carbonation out. 2. Drink the soda through the area around the pull tab. 3. After you're finished, rinse the outside and pull tab area of the can with water and a small amount of anti bacterial soap. 4. Poke a small hole in the bottom of the can with a pointy object. The bigger the hole, the faster it fills, but also the harder it becomes to seal it. 5. Get a large cup (has to be big guys) and fill it with water. 6. Put the can in hole side up, and weigh it down with a heavy object. 7. Wait for it to fill up, then take it out and dry off the bottom with a clean towel. Then (be quick about this) use a piece of tape to seal the hole in the bottom. 8. Happy trolling.