Copperworks American Single Malt Whiskey Rogue Spirits Whether you're a connoisseur seeking Casa Magdalena Whether you're a connoisseur seeking a new discovery or simply looking for a reliable dram to unwind with The Glenrothes 25 Year Old is composed of the finest ingredients Copperworks American Single Malt Whiskey was crafted from eight casks of whiskey that were brewed and distilled from 100% of the Copeland variety of barley grown in Washington’s Skagit Valley and smoked during the malting process with Washington peat Each cask of whiskey was matured for just over four years in lightly charred (char #1) new American Oak casks