Every fingerprint is unique. The same is true for every barrel of bourbon. Old Forester Single Barrel is bottle from one individual barrel, so there is no other bourbon exactly like it. Old Forester Single Barrel is crafted using the time-honored methods established over 140 years ago. Depending on the barrel selected and the angel’s share lost to evaporation during aging the barrel, each Old Forester Single Barrel selection should produce between 200 to 240 750ml bottle of bourbon. 45% alc/vol (90 Proof).