I'm really feeling this bike tool roll made by Road Runner Bags. I'm sure a lot of people out there only think to carry tools, like to fix a flat, if they are going out on a long ride. However, we all know a flat tire can happen anywhere, whether or not you're carrying tools. This tool roll that easy fits under your saddle is a perfect solution. It's waterproof, so you can leave it under your saddle and forget about it until you need it. Or, if you lock it up, you can remove it easily and toss it in your bag. It's perfect for carrying tire levers, a tube, and pump for fixing a flat, but can also fit other stuff like a multi-tool or chain lube.