[header] How to store apple cider vinegar [title] Screw the cap on tight. [step] Vinegar is a food that doesn't really go bad, per se. However, if you leave the cap open, bacteria and even bugs can get into it, so make sure you have the cap on tight before storage. 
[title] Keep the vinegar out of direct sunlight. [step] Stick your vinegar somewhere the sun can't reach to help it retain its quality.