Source: https://www.amazon.com/KONG-Naturals-Catnip-1-Fluid-Ounces/dp/B001U8CED2/ref=as_li_ss_tl?ie=UTF8&psc=1&refRID=509MSJRYKV6TK1JW7WNN&linkCode=sl1&tag=randallheavy-20&linkId=3d7e2f62c2d93fb7e3f7084677e8f6ee