The Beeztees Plastic Adjustable Treat Ball Twirly is a fun puzzle for your cat. This snack ball stimulates your cat’s senses. This snack ball has an adjustable opening, allowing you to choose how difficult it is for your cat to access the treats. And of course, your cat can eat the treats if they fall out of the ball. With the Twirly, your cat will never be bored. Diameter: 5.5 cm