Outlanded at a lonely little county airport once and got thoroughly interrogated and searched by a very young, completely freaked out sheriff's deputy (female version of Barney Fife). She was asking if I had weapons or drugs onboard when she spotted the "used" ziploc baggy pee bomb protruding from under the seat rim. She snatched it up and it was about two beats before she realized what she was holding. That significantly dampened her enthusiasm for further searching.

I use a male adhesive catheter and "leg bag" for myself, but make up a few "guest" baggies for use in our duo. Those are just quart ziplocks with a heaping teaspoon of Sodium Polyacrylate (the magic absorbent in diapers). You can get it on Amazon, a pound will last many lifetimes.

Unused this would definitely get the attention of the sheriff. White powder in a plastic bag, huh...

RR