Excellent surface treatment, internal mirror polishing, external matte texture. Unique circular bottom, without dead corner, helps food slide to the bottom of the bowl central. Special widen edge makes dog's eating more comfortable. High quality composite resin material (100% Polypropylene), soft and tough, never deformation. Special coating on the surface, no residual stains, easy to clean. Nice strong skidproof mat. Passed a special antibacterial experiment. Bright colors, never fade, completely harmless raw materials. Can be stacked, space saving.