Port storage

[PinotEnvy]

Someone in my office was asking me how long you can store an open bottle of port (not open yet). I told her I don't know, but I bet I know where I can get the answer. Also, do you have any reccomendations? For most wines, I pour leftovers into 187ml bottle(s) and refrigerate them. Is there anything about port that would give any differant reccomendation?

Thanks in advance.