You know the drill. You're on a road trip, miles before the next stop. One of your kids needs to go. Or worse yet, YOU need to go. Pulling over by the side of the road isn't an option- perhaps too much traffic, or you have a sleeping baby that you don't want to wake.
My wife has purchased disposable travel urinals before, but they cost $1.50 to $2 each. This is cheaper.
Step 1: Supplies
1 disposable cup (I use old ones destined for the garbage)
1 plastic newspaper sleeve (again re-used). Alternatively you could use the little baggies made for dog poop.
1 diaper booster pad, or bladder control pad. Alternatively, you could repurpose unused diapers your child has outgrown
tape (duct or shipping tape)