traveljohn.com
These are convenient, "urinals" if you will, than can be lifesavers. I know someone who didn't make it in the hurricane evac traffic. Yep, nice wet car seat and a lot of embarassment.
There might be similar products around - try searches for travel, healthcare and camping supplies.
I'm thinking that there are "special needs" items in the medical areas that might serve well in such evac/refugee situations.