I know I recently mentioned in one of the recent threads on this topic, but I can’t find it just now . . .
Maybe airline passengers should all just wear Depends or a pee bag with a condom-style catheter. It’s sometimes called a “motorman’s helper” (for streetcar drivers and conductors who have long runs) or a “stadium pal”.
I did, however, just find this old thread specifically on the subject. See, in particular, Post #2 there:
See that link “this is not an amusingly theoretical discussion” for a very detailed TMI-level discussion.
See also the final post, #20, in that thread for a question that was never answered:
Apparently, from other remarks I’ve seen on the subject, female passengers (or pilots) have fewer plausible options, which may be limited to diapers or the female version of Depends-like products.
As someone (sorry, forget who) remarked in that thread I can’t find right now (paraphrasing from memory): If it’s good enough for a homicidal astronaut, it’s good enough for you.