Dearest Yooper, At a friends Chicken stew last night we found a growler of the barrel aged version of this that I originally sent you. It was probably 2 years old! I use a bowie bottler every fill but was worried about it being oxidized due to the age in the growler. Surprisingly it was fine...still had carbonation and a distinct whiskey taste. The roast flavor had diminished a bit but it was still very drinkable! The Beer Gods were kind tonight......