Jw hole rowler is a fun, versatile dog toy with the durability you've been searching for. Rubber gives it strength, bounce and a soft texture. The unique open design allows you to stash small treats or kibble inside for hours of entertainment for your dog. This is a non-toxic, durable rubber, super-stretchy, multipurpose dog toy. It's a fantastic treat ball, wonderful training aid, great for fetch, toss and tug, chewing and teething.