Only 1,776 bottles of the coveted whiskey will be available.Credit: Courtesy of The Bulleit Distilling Co.Key PointsBulleit is releasing its oldest rye whiskey ever, the Bulleit 20‑Year‑Old Straight Rye Whiskey.Bottled at 137 proof, the aged spirit still features the spice and complexity consumers expect from rye whiskey even after two decades in barrels.Although rye was once the most popular spirit in the United States, it largely disappeared a…