The guys at Chromoly came up with a brilliant idea called “Road Popper”. The Road Popper is a bike-mounted bottle opener that they developed for their own use and decided afterward to share. They designed it to attach discreetly to the rails on the underside of the saddle to help keep your bike looking crisp. So far, it’s worked on all the bottle caps they tried on. They had it rapid prototyped to order in bronze infused stainless steel by Shapeways in Holland. Here’s a link to the store and the info sheet if you’re interested in buying one.