We Use Only Top Quality Utilized Natural North American Catnip For Gigwi Refillable Catnip Toys. These Toys Have A Special Fastener, So That Fresh Catnip Teabags Can Be Added Again And Again “ To Last All Your Cats Nine Lives. Catnip Is A Natural, Non-Addicting Herb That Encourages Playful Behaviour For About 70% Of Cats, Which Have An Inherited Gene That Compels Them To Respond To Catnip.