KONG Catnip Infuser refreshes toys infusing them in the irresistible scent of KONG North American Premium Catnip stored in the bottom tray. Screw off the bubble top and store the 6 pom-poms inside. Rotate with other toys that need to be refreshed with catnip, keeping cats engaged and playing longer. Includes KONG Premium North American Catnip. Add magic to toys-no penny needed!