A collaboration of Slipknot and Cedar Ridge Distillery, made with Iowa corn, with some extra spice from its rye content, Slipknot No. 9 Iowa Whiskey is a bold-flavored blend of 3–4 yr. old straight rye and straight bourbon, mashed, fermented, distilled and aged at Cedar Ridge. Mashbill: 51% corn, 35% malted rye and 14% two-row malted barley.