Use Starmark's unique Everlasting Treat with Dental Ridges or original Everlasting Treat in the top. Increase the challenge by adding smaller treats inside and in the grooves. Stronger than rubber and great for powerful chewers. Free of latex, vinyl, and phthalates. Treat ball system encourages play which helps reduce anxiety and boredom behaviors. Great for dental hygiene. Comes packaged with USA made Everlasting Treat with Dental Ridges. * Holds a variety of treats and kibble * Made with virtually indestructible material * Provides hours of challenging play * Dishwasher safe * (3) Sizes available: Small, Medium, and Large * Small Dimensions: 3" x 3" x 1.