Cardboard egg crates are a great way to increase the surface area in your dubia or cricket colony. They also provide tight hiding places that dubias love! For best results, place the crates vertically in your colony, you will find them hiding all over the place but take a look underneath to see them all congregate together making it easier for you to transfer into your reptiles dish.
Crates are apx 12"x12" and sold by the each.