Or do they use a bowl ?
Silly Men, women don't pee in bottles. And if it is a bowl it has to be inside (definitely not in the woods or a car), and if there is no toilet paper they hold it.
I work after Midnight, so thank god for the 24/7 Mcdonalds' (unlesss there is no toilet paper).
Supergirl cannot per in a regular bottle as her superhuman strength and her urine would blast through the bottle creating a big mess.
supergirl can, she got superror powerz!
You seriously need a vacation.