You know, one thing we could probably use in an emergency is adult diapers. OK....I'm serious here.
Just think, what if we had to sit in traffic for hours on end, or take shelter somewhere that had no bathroom facilities. I know me.....and when I gotta go I gotta go....and the waterworks will start with or without a restroom...

. I drink lots of water all day and
have to have access to a restroom.
I know it sounds icky...but in a disaster situation or just an evacuation a few hours without use of a potty can be pretty rough.
I'd feel better just knowing they were there......