The Glenfiddich 18 Year Old Ancient Reserve is a truly superb single malt aged in Oloroso (Sherry) and Bourbon casks. Then up to 150 of the most exceptional casks are hand-selected by the innovative Malt Master, Brian Kinsman. These casks are then married in small batches in oak tuns for up to three months, to give a remarkably deep, rich and complex flavour.