The Kong Puppy Teething Stick™ is made with unique Kong Classic puppy rubber. The Denta-Ridges™ gently clean teeth and soothe sore gums when chewed. Fill them with Easy Treat™ or Peanut Butter. Playing with the Puppy Teething Stick™ helps teach puppies appropriate chewing behavior. Use with puppies until they reach 9 months, then they can graduate to Kong Classic Rubber toys.