Not so well preserved

Sorting through my cupboards recently, I came across this sorry sight. It's spiced apple chutney from a couple of years ago which we're still enjoying, although after two years I'm keen to use it up. Two jars were stacked together and, trying to remove the uppermost jar, I found it was stuck to the lower one. Chutney had oozed through the lid because the vinegar had corroded the metal. Yikes! Next time, I'll be using waxed paper disks before securing the lids (and probably won't keep it for as long). Lesson learned.