A rare bottle of Irish whiskey last week became the most expensive bottle of whiskey (or whisky) ever sold at auction. A bottle of The Emerald Isle, one of just seven that exist, sold for $2.8 million—breaking the record set just two months ago when a bottle of Macallan Adami 1926 whisky sold for $2.7 million. (Scotch whisky, like the Macallan, is made in Scotland; then there’s Irish whiskey, like The Emerald Isle, bourbon, rye whisky, and more.) The Emerald Isle is distilled by the Craft Irish Whiskey Co.; Fox Business notes Ireland has been working toward its whiskey having the same level of…