White wine vinegar query
For white vinegar: basically forever. 

Vinegar is acidic, so most bacteria won't grow in it. Plain white vinegar in a sealed container will keep longer than you'll be around to use it.

Some vinegars (balsamic, wine vinegar, etc) can experience flavor changes &amp; other undesirable effects when exposed to air, light, or extreme temperatures. Stored in a sealed container in a cool, dark place, they will keep for a very long time--but not always forever.