When I was a volunteer firefighter, we would regularly attend the Fire Department Instructor Conference in Indianapolis. The trade show at the end of the week always had some interesting things in the booths. Some were from firefighters who were trying to sell their invention, others were from big companies testing the response. One product I saw that may have some use for cyclists was called Brief Relief. It was a bag with an absorbent material that you could urinate into and then seal up for disposal. They were marketing it to fire departments and utility companies who spend a lot of time outdoors without bathroom facilities.