Made of the highest quality heavy stainless steel you can feel the difference between Durapet Bowls and all the rest. A durable permanently molded rubber ring on the bottom provides stability and eliminates skidding. Durapet Bowls are dishwasher safe. Unlike plastic bowls that may harbor bacteria or leach toxic plasticizers and colorants when they come in contact with food Durapet Bowls are hygienic and will prove more economical in the long run when compared with plastic dishes.