Demon Box is a blend of imperial stouts, patiently aged in bourbon and rye whiskey barrels. This year's blend consists of: 55 % aged for 19 months in Barton and Stagg JR. bourbon barrels 15 % aged for 35 months in Woodford Reserve bourbon barreIs 15 % aged for 35 months in Old Watermill rye barrels 15 % aged for 11 months in W.L. Weller bourbon barrels.