Slipknot Red Cask IOWA Whiskey is here! Building on the success of Slipknot’s award-winning No. 9 whiskeys, Red Cask takes Cedar Ridge’s aged bourbon and rye whiskeys and finishes them for an additional year in estate-owned, red wine casks before expertly blending them for this most recent release. The red wine finish gives a new dimension of flavor, body, and finish to the final product; all while packing the punch Slipknot No. 9 fans have come to love.