The Exo Terra Mealworm Feeder food bowl allows reptiles to see their food (mealworms), and the specially designed edge ring prevents the larvae from coming out. Vitamins and mineral supplements can be easily added, and the excess can be reused. It is made of two parts to facilitate cleaning. It has a natural appearance, is easy to clean and keeps worms when placed in the terrarium. Otherwise, they will quickly "escape" by digging through the substrate. There they will remain hidden until they become inedible beetles. They are more likely to die, and their decaying bodies create the precondition for the appearance of harmful bacteria.