I have two of the 120 cm dishes that i use for live normal size mealworms. To date none of the mealworms have escaped. I can recommend these dishes. I did however, as already reported in other feedback, find removal of the sticky "peel off" info a problem. This is overcome by immersing the dish in "boiling" water for 5 minutes and removal by peeling, this does leave a sticky residue that can then be smoothed using fine sandpaper !.