KONG Cat Refillables These soft and cuddly plush catnip toys have a resealable pouch to keep fresh catnip securely in place. The toys contain a generous amount of KONG's premium North American catnip in a resealable vial. When the catnip scent starts to fade, simply add some fresh catnip for another round of fun! Catnip can be stored in the freezer to keep it fresh. The toy is machine washable once the catnip is removed.