SmartyKat-FishyNip Refillable Catnip Diffuser Toy. Catnip is a safe and natural herb that revs up feline activity levels, increasing excitement and enjoyment. Catnip toys attract cats and prompt them to frolic, romp and play. This package contains one 2-3/4x2x2 inch fishy nip toy with organic catnip in the center. Imported.