SportPet Designs Chew King Premium Treat Dog Toy, Extremely Durable Natural Rubber Toy Hail to the king it's endless treating fun and, unlike synthetic treat toys, no chemical smell Durable, natural rubber retains shape and stands up to tough chewing Safety air vent protects your pup, keeps happy tongues from getting stuck Three sizes to entertain schnauzers and st. Bernard's alike, treats are not included Great for treats and rewards, yet holds up to 1 cup of kibble (in xl) to keep meal time entertaining