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 toysno penny needed!