The new expression joins the existing 10 and 17 Year Old Single Malts, which were repackaged in November. It has been matured in hand-selected, first-fill European oak sherry casks and will retail at £69.99.
In a move to create a premium status for the range, the original presentation tubes have been replaced with boxes, and tasting notes written by the master distiller have been added to the redesigned label and presentation box.
Iain Weir, marketing director at Ian Macleod Distillers, said: "The 21 Year Old is the pinnacle of the Glengoyne core range. This excellence is now clearly reflected in the packaging design too, giving customers a much clearer understanding of how much the Glengoyne 21 Year Old has to offer."