[Vishseer] The Macallan 15 Year Old Three-Catas Whisky: The unique and complex blend of European red oak sherry casks, American white oak sherry casks, and American white oak bourbon casks gives this 15-year-old single malt whisky an unexpectedly smooth and delicate taste. The distiller's careful and skillful blending of these three types of casks creates this intoxicating whisky.