Shelf life of opened bottle of vinegar
I am debating whether to order a 5 liter container of champagne vinegar to save a few bucks, as we have to order it for delivery. It would probably take us a year or so to go through that quantity. Any idea how long a bottle can be open before it deteriorates? or does it??
It should be fine. You could also infuse a few smaller bottles with herbs; those would make nice gifts.
I've kept other kinds of vinegar around for over a year without problems. It's already vinegar, after all. If you're worried, you can keep it in the fridge. Assuming you have plenty of extra room ;)
Though if it were in plastic, I'd be wary of a year of plastic dissolving into the vinegar--but that's just me.