How to get toothpaste back into the tube.
I think if I had to travel a lot, I still wouldn't bother with this. That's what the little "overnight toiletry" bins are for at the local discount department store. Just buy the little tubes and bottles of crap when you get there; it's not going to cost that much.
If anyone runs across something that is an equally stupid waste of time (like looking up shit about toothpaste for my paper), by all means, post it so we may be amused.