If faced with this situation, I would be looking for ways to get the liquid away from me and the bike, not for a way to carry it with me and certainly not to sit in it. If a quick stop on the side of the road won't do it for you, something like the Texas catheter would seem to be the next best thing.

Sorry if you thought my first response was lacking compassion. I wasn't 100% sure you were serious at the time and I kept getting the image of that nutty astronaut lady driving across the country to get the woman who took her man.

I have to drink so much to keep my throat from drying out that I have to go frequently and sometimes urgently. I do have to stop and walk to the edge of the woods sometimes during a ride, but the thought of an adult diaper never crossed my mind.