I think this thread has become totally bogged down (hohoho) in confusion between
pee and
poo.
Pooing while in the air must be an awful problem. An autopilot will take care of the controls, and you can warn ATC in advance to not expect you online, but you need a sizeable container which can be sealed, and it's going to be very messy. I know this is stating the obvious but if you need to poo that badly then you must have a serious internal upset and what comes out is not going to be of particularly solid consistency!! Nor is it going to come out slowly... I would guess a large self-seal plastic bag is going to work, but there's going to be a lot of cleaning up to do.
Peeing is easy, using the various devices described. Women will probably prefer a bit of privacy, like climbing into the back seat, but it works perfectly.
Leaving aside those who fly across the Atlantic, or just have to do Northern England to Southern Europe in one hop, do many others actually think about this that much?
The name of the game in long distance touring is to get somewhere which is different, interesting, etc, and (in case the weather goes bad) OK to spend a few days in before moving on. One can't usually achieve that in a 30 minute flight; well not from the UK. I like to make the first leg 4-5 hours and that gets you somewhere nice and warm.
I'd say that something to pee into is absolutely essential. Maybe gurlz have better bladder control (because a proper gurl can't just get behind a tree and whip it out like a boy can) but I have been on an 1hr flight and ended up absolutely totally completely desperate and just about to pee myself. Especially in the winter, and doubly so on winter evenings/nights.
There is no excuse for not carrying a bottle to pee into. It's totally bonkers to expect somebody to land, just for this purpose, surely
