This is a dumbbell-shaped toy made of natural rubber, designed to be filled with treats for your dog to play with. - Brand: unipod - Model Name: Dumbbell - Material: 100% Natural Rubber - Colors: Pink, Yellow - Features: A toy that stimulates your dog to think about how to get the treats out Thank you for looking! This toy is a great way to provide mental stimulation for your beloved dog! It's perfect for long periods of alone time, such as when you're away from home, or before/during guests arrive, as it provides a lot of brain stimulation. Of course, it also works great as a regular toy, so please give it a try.