SAFE METERIAL: Non-odor material ABS. High-quality plastic is used to make this dog treat ball. EASY TO CLEAN: You just need open the transparent part of the top and clean the toy easily. IQ INTERACTIVE TOY: The IQ puzzle balls stimulate intellectual growth, increase daily exercise, help in training your pets both in agility and intelligence. HAPPY TO EAT: The dispenser chewing food toys have three blowholes on the top, and the pet\'s sensitive nose can easily smell the food inside the ball. TUMBLER DESIGN：Tumbler design of the green ball toy make it roll in a small area while playing. The dog food won\'t sprinkled everywhere.