I know it wouldbe just as easy to go out and buy a new bottle for nomore thah it cost. But I have a bottle of Red Wine vinegar that has a best by date of June 28 2010. It has never been opened. DIL says she thinks it would be good yet since its unopenened and vinegar doesnt spoil and wine gets better with age. While that may be true or not, Im tempted to try it. Any thoughts? This bottle was put back in the cupboard behind other things and forgotten, nice and dark space.