DR. NOYS' CATS WITH AN ATTITUDE TOYS ARE FILLED WITH ONLY THE FINEST CATNIP AVAILABLE ON THE MARKET. AND, AS A BOUNUS, YOU CAN OPEN THE PATENTED ";HIDDEN"; CLOSURE AND REFILL THE TOY WITH OUR MESS-FREE T-NIPS CATNIP PACKETS AFTER THE OLD CATNIP HAS LOST ITS STRENGTH. DR. NOYS LOVES CATS AND CREATED THESE SAFE, HIGH-QUALITY TOYS WITHOUT ELASTIC, STRINGS, MYLAR, OR EXPOSED BELLS.