If you carry a p bottle, I figured out something that works better and doesn't take up any space or make noise. A good quality 1 gallon freezer bag with a zip liner that closes securely. You can open it the correct amount, varies with the individual I guess, insert the ol p'er and do your business. Then you zip it back up and store it. The good ones won't leak. It works great in the stand and you can just drop it to the ground or place in on your foot platform until time to leave. For you guys that's a little dense, I'm not talking about a sandwich bag with a fold over top, I'm talking about a zip lock top. A gallon is plenty big, you could probably get back with a quart or two quart bag.