Petmate's Crock Bowl with Microban is made of 25% recycled content and has extra thick walls. These crocks resist scratches and nicks. Treated with microban, which helps prevent the growth of stain and odor causing bacteria. They are easy to clean and dishwasher safe. Durable plastic bowl. With Microban antimicrobial which helps prevent the growth of stain and odor causing bacteria. Extra thick, chew resistant walls.