Zwack’s newest product is Unicum Riserva, a special version of Unicum which comes in a clear, round, and flat bottle. It’s aged twice, first in an 80 year-old Unicum cask (the largest and oldest in the distillery, according to the company) and then in a a Tokaji aszú cask. Aging in the old Unicum cask—which has acquired a sticky black coating of Unicum residue—gives the drink more depth and character. While spending time in the Tokaji cask gives it a Tokaji-flavored sweetness, bringing some of the familiar aszú flavors into the mix, along with an added mellowness. To finish it off, a bit of Tokaji aszú from the Dobogó Winery (run by Izabella Zwack) is blended into the drink. It’s a gorgeous, smooth, sip of history.