just a note.. i feel the best thing to use if not using eggcrates is cork no not the flats or tubes,its made just like plywood but 100% cork iv seen a few roach motels made with them ^_^I would just make sure any wood you put into their enclosure is safe for them to nibble on. I know this should be common sense, but I lost a few roaches that munched on plywood that I was using in place of egg crates.