The standard crock dish uses a heavy weight design that eliminates movement and spillage. Crock dishes are a superb choice for providing either water or food to your animals. Feeder insects such as dubia roaches, mealworms, and superworms are unable to climb the smooth, grainless sides. Leafy greens, fruits, and vegetables often spill out of standard feed dishes, whereas the deeper well of crock dishes can greatly reduce spillage. Easy to clean, too!