My friend has a 427 coustomer lawn business and he is always on the go. All 4 of his 6x12 enclosed trailers have home-made stand up johns in them in the front of the trailers (made out of PVC pipe and a upside down bleach bottle cut open that drain to a 5 gal. Home Depot paint bucket w/ a top). He's told me, and I agree with him, they're not "Febreeze" smelling, but they don't have time to stop at every McDonalds and let his 28 man crew get out and open the relief valve. He's told me (even though I would of rather not known this) that quite often, almost every day, the guys have to go sooooo bad , they share one! I didn't know what to say to him at the time, so I didn't say anything !! Anyone have a better solution for him?