It may have gone off...

I got this as a present from some spanish exchange students some many years ago. At the time I thought I'd keep it for a special occasion. Only thing is the special occasion never really cropped up and then by the time I was having more special occasions than I knew what to do with, I'm thinking is this going to be okay to drink? So it has stayed in my cupboard gathering dust and becoming a reminder, when I chance upon it, of foreign friends and good times had.