Tupperware it is then. I'll hit up the target again and see if I can get some solid color food containers and cut a hole in them. You are right, the RBI hides the next size down are half the size of the ones in the pic. He really should make an in between size but they do grow so fast there is almost no point...

So 2 smaller hides, uth/thermometer/tstat etc... water dish, vent holes and it should be good to go. Now I just have to clear the shelf out and adjust it down so the tub slides in and out nice and tight... Going to use the lid though since it is only 1 tub and I want the added security. If it was a rack I would not care.