After all, Mackay says that fundamentally, the process to design, create, age and blend Bulleit 10-Year Bourbon has not changed much since the product was first introduced in 2013.

The oldest Van Winkle bourbon ever released was aged for a staggering quarter-century. While some of the oldest Scotch whiskies break 80 years in the cask, 25 years is mind-blowing for bourbon.