Zanies Hard Rubber Cosmic Cones Cosmic cone dog toy is the perfect way to satisfy a dogs natural chewing instinct Made of dense, hard rubber, designed to withstand even the most aggressive chewers Grooved design helps clean teeth and stimulate gums Hollow center can be filled with treats to add an intellectual challenge for dogs prone to separation anxiety Measures 5-inch length by 3/4-inch diameter; available in sky blue color