The KONG Catnip Infuser refreshes toys by infusing them with the irresistible scent of KONG North American Premium Catnip, which is stored in the bottom disk. Screw on the top and store the 6 pom-poms inside. Rotate with other toys that need to be refreshed with catnip, keeping cats engaged and playing more. Includes KONG Premium North American Catnip. Add magic to your toys.