Plastic bags? Whats wrong with empty plastic water bottles? At least they have a cap.
Urinating into an empty water or soda bottle on an airplane is difficult. The opening is just too small.
Urinating into an empty gatorade/powerade bottle on an airplane is immensely easier. The opening is only twice as large, but an order of magnitude easier to use.
Urinating into an airsickness bag is easy, and the thing is water tight. It MUST, however, be kept upright ...
Easier for men than women. And the latter are the ones with the weak bladders.
Then there’s the matter of Number Two ...
E\Peeing in empty water bottles?
That’s how you make “Truckers’ Lemonade”.