The envelope stands out on doormats because it is illustrated with a pre-Raphaelite angel blowing a trumpet under which the recipient's address hangs.
Presky Maves developed the angel angle after whisky buyers told client researchers that when they are faced with three similarly priced brands on the shop shelf, they will buy the single malt Scotch whisky that has spent the most time aging in the cask.
Compared with its immediate competitors in the single malt market, Glenfiddich 12-Year-Old Special Reserve is matured for two years longer.
Presky Maves' creative centres on the generally well-known whisky tale, the "angel's share", the name for the 2% of the spirit that permeates through the cask into the air during the maturation process.
Inside the envelope, further illustrations and copy push the theory that the angels around the Glenfiddich distillery must have a longer, and party better than those at distilleries that only mature their whisky for 10 years.
Stuart Woodlington, creative director at Presky Maves, said: "We could have just said Glenfiddich matures its whisky for two years longer, but we think this is a truly engaging idea and the beautiful art direction really reflects the festive season."
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