A collaboration with Tullibardine and Firestone Walker, Polly?s Casks is an innovative whisky ? the first ever single malt Scotch to be finished in a cask that has previously aged beer. 60 of Firestone Walker?s Double DBA casks were shipped to the Highlands of Scotland to help finish the maturation of Tullibardine Highland single malt in the Ochil Hills of Perthshire. A whisky with no peers, Alexander Murray Polly?s Casks is absolutely uniquely nuanced: the influence of beer on the finished product is amazing. Matured in ex-bourbon casks and used beer-filled bourbon casks.