Blended Scotch Whisky The Reserve Rare indeed are the whiskies selected for DEWAR'S 18 Year Old - and even more unusual the painstaking care of our Master Blender in managing the time-honoured 'marrying' process that lends such refinement to this exceptional blend. Only the very best 18 year old malt and grain Scotch Whiskies are chosen to create DEWAR'S 18 Year Old, a sweet and mellow whisky with notes of butterscotch and almonds.