If you haven't tried them, you don't know what you're missing. They
might not come in every size you need, but you just can't beat the
fact that they are SELF-CLEANING. I think that's really cool. Talking
about the ones with the smooth cloudy clear sides. Apparently it's
the type of plastic. If anything sticks to the sides or the bottom,
it will become unstuck within a couple of days. No residue climbing
up the sides of the box. None. Apparently not even on the bottom
after it becomes scratched up.