Originally Posted by User Name

Air and light are the two things that usually make beer go bad. This is why beer stored in cans will, in theory, fare better over time than bottled beer (especially if you don't know how it's been kept). Some beers age particularly well, although these are usually stronger beers that have been bottle-conditioned (some yest left in at bottling). However it sounds like this 'Billy Beer' was utter shite to begin with, so I'd save your money and spend it on drugs and loose women.