I bought an 18 gallon black tote bin from the Container Store. I wanted a taller one then the one I had previously so that i didn't have to cut up the eggcrate to fit, but could just stack them on end. They fit great in this bin, without touching the lid. I drilled about 3 holes on each side, and I'm going to cover these with either screen or small vents one of these days. A couple of the roaches got out and were wandering around! They must have climbed somehow from the top of the eggcrate to one of the vent holes. Anyway, this is unusual.
Also placed a flexwatt mat at one end of the bin, which i ordered from one of the roach suppliers. (I didn't want to make one myself.) I did have a sheet of cardboard between the mat and the carpet, but since then I found a polystyrene sheet, which I'm using instead, and the temps are much better with this. Around 80 degrees. The food goes at the other end of the bin, where it's cooler, and I usually give them orange peel, yam or sweet potato, plus cricket crack. Sometimes, I forget to feed them, but not usually more than 3 days. The bin is by the patio door, and even though it's not that warm there, and can be draughty, they have been been breeding! I haven't been doing this very long, so I've been learning by reading on this forum.
I really like these little guys. They don't smell, are quiet, and Piko loves to eat them! Which reminds me, they need cleaning out ready for the New Year! Good luck with yours!