A 1926 bottle of The Macallan Adami is the most expensive whiskey in the world. It sold for an absurd £2,187,500 ($2.7 million) at a Sotheby’s auction in London. There are only 40 bottles of The Macallan 1926, of which twelve were designed by an Italian painter Valerio Adami. This is one of those 12 unicorns.