(This whisky has recently been repackaged as a standard 21 Year Old as opposed to its previous incarnation as 'Gran Reserva'). Glenfiddich resurrects the lost tradition of maturing whisky in rum casks with this Glenfiddich 21 Year Old single malt Scotch whisky. Rum distillers from Sancti Spiritus, near the Sierra del Escambray in the heart of Cuba, worked to develop this unique Cuban rum finish. Casks of Cuban rum are decanted at the distillery in Scotland and then filled with 21 Year Old Glenfiddich to absorb the unique character lingering in the wood. The result is the unmistakable Glenfiddich flavour revealed through a new and vibrant overtone.