What do we mean by finished in Rum. This means that the whisky has been double matured: a first maturation in a bourbon or sherry refill hogshead followed by a finish for a minimum of twelve months in a freshly emptied Rum cask. Whisky Gift. Very rare 50% alc/vol. One bottle of 264 bottles 25th Birthday gift ideas and silver anniversary . If this is a special gift you can pick the delivery date after you checkout