Lee's Mealworm Dish Mealworm Dish Features Smooth Interior Surface And Inward-Curved Walls Make It Extremely Difficult For Mealworms To Escape From This Dish Made Of Plastic Material Mealworm dish contain curved walls keep small to medium sized mealworms confined Perfect For Geckos And Other Small Herbs That Like To Find Their Food Right Where You Left It Measures 3-Inch Diameter