There are only two occasions where I use rubbermaids or rack systems.
1. Hatchlings that I'm planning on selling after a couple of meals. In my case they're hatchling Spotted Pythons and I'm using Sterilite #1851 6 Qt/5.7 L tubs. Here's a pic (be kind, it was my first time building ANYTHING lol):
2. For quarantine purposes. I had a BCI that was regurging and wasn't doing well. So in order to get him away from the rest of the collection, I sent him up in a rubbermaid in another room.
Jenn