Simple brilliance. From Laura:
I keep a small cardboard box in my minivan to corral essential cleanup items (antibacterial wipes, a roll of paper towels and some diapers and wipes for the little ones). What I found really useful is to stuff the paper towel roll with plastic shopping bags. This serves two purposes: keeps plastic bags handy for bagging up dirty diapers, lunch trash, wet things etc, and keeps the paper towel roll from getting crushed flat.
Why didn’t I think of that?