There are plenty of projects that will tell you
what to do with your old bike inner tubes, but what about the old valve stems? Well, the zipper pulls on my backpack started falling off, and I had seen
Schrader valves used as zipper pulls, so I figured that it shouldn't be to hard to do the same thing with my Presta valves, and I'm really pleased with the result and how easy it turned out to be.
You'll need a Presta valve, of course. You can pull one pretty cleanly right out of the tube, or if you're lucky like me, your pump will do that for you :-/
You'll also need some cord for the pull, some fishing line or strong thread, glue, scissors, and vice-grips or pliers.