Nothing wrong with taking a leak in a cup. I recently bought a trailer. It is a cargo trailer, but the best part of it is when I am towing it, I can pull off anywhere, go in and use my handy pee bottle...anytime, anywhere :) Trust me it sucks getting old!
Haha, a bottle might be a better solution. I think the good lady was more concerned with who's cup it might be!! :0D