The oldest bottle I've had was one of the last bottles off the line before the PBR factory shut down in town (drank last year), one of my club members worked the line until the end. I think it was around 1982 or 1983, which puts it at about 36 or 37 years? It was both better and worse than I expected. The club member has suggested that he has more bottles, and I don't know how I feel about that.