Interesting discussion here and, to those of you 235/320 drivers who who haven't reached the "Golden Years" - i.e., not yet gotten nearly as old as me, you're gonna need some kind of relief tube system when you do.

For a time, I used the gel-packs but found that the only way I could be sure I could get gravity assist (peeing downhill) was to unhook the seatbelts, turn on the left side which required getting a leg over the stick and trying to hit the opening in the bag - all the while keeping one hand on the stick so I wouldn't be involved in some interesting aerobatics. In fact, that's the only reason I installed a wing-leveler after some unfortunate mishaps in turbulence (at least my seat covers come out for a trip to the cleaners).

I'm sure there are many solutions but I finally settled on installing a small venturi tube on the left landing gear strut which is only exposed when the gear is down. It's connected via tubing to a container that I can use without turning on my side. Works pretty well though I have to slow down to gear speed to use it. Incidentally, I did test the thing by pouring a container of water into it which went out so fast I'm very careful when I use it. In any case, it sure saves time (and fuel) on a long cross-country, eliminating the biological stops when I still have half of my fuel remaining!

Dan Schaefer
Early 235 -  N235SP. First flight 1993 and still going strong.