Starmark everlasting treat bento ball dog chew toy is great for keeping boredom at bay, the everlasting treat ball will keep any dog happily occupied. The unique design causes the ball to wobble and roll erratically, keeping on its toes. You can fill the everlasting treat ball with small treats or food that dogs have to figure out how to remove from the ball before they can enjoy. To make things more challenging and keep dogs busy for longer, plug both ends with everlasting treats or interlocking treats after you fill them. The everlasting treat ball is very durable with silicone that is added to the rubber compound giving it extra strength and durability. This comes in small size.