You know what's really funny... I'm in the middle of moving at the moment... And I had a lot of stuff in storage. I pulled out one of the things that I had in storage and the first thought that came to mind was... "Wow, this would be a *perfect* cheap ready made rack system for some babies"...

Here's a photo. It's a sterlite, would have to use back heat. No gaps for escape, could get dimensions for you but I have to find the box that my boyfriend packed the measuring tape in first.... (on a side note... out of the million boxes that are scattered and unpacked the one thing he wants me to unpack today is his nail clippers... needle in a haystack or what?)