We are using 60ltr tubs, cut holes in top and used metal flywire stuck in there with a craft glue gun. We sit a tub full of damp potting soil(for egg laying) in each tub on top of egg cartons for seven days, then put egg tubs in tupperware boxes on top of our freezer(with lids with airholes) then into new 60ltr tubs for the hatching time. We now have thousands of little crickets hatching. Don't give them water, just spray wettex sponges and sit in some sort of lids, as the little pinhead crickets will drown if you put in a water dish. Lots of info on Melissa Kaplans site. She's good. Cheers Cheryl