This glorious Glen Grant single malt spent a whole three decades maturing between 1990 and 2021. Intensified by time in a sherry cask around one-eighth of the size of a standard butt (allowing more rapid interaction between the whisky and the cask), the team at indie bottler Duncan Taylor spotted that it was a special dram, and a worthy whisky to bottle up for The Octave series. A release of 85 bottles.