Yeah it's kinda a pain in the butt if u gotta slide the tub right out to take the lid off. When I built my rack, I made it so the top of the tub is nice and flush with the top shelf, so there is barely a space for anything to get out. I have a very small JCP in a tub in the rack and hasn't escaped, so I'm pretty happy with it. Just have to fill in the last 2 spots with some new snakes!lol