Pickled Onion Vinegar

Ever had a jar of pickled onions which when the onions are gone is still full of vinegar.  Ever tried it sprinkled over home made chips it is lovely and adds a lot more flavour to the humble chip.I simply drain off any spices that remain in the vinegar through some muslin, and then decant into a sterilised bottle and keep it handy.  You therefore get double the use out of the vinegar and it satisfies my waste not want not philosophy. If you make your own pickled onions as I do occasionally a jar gets left over from the previous year and sometimes the pickles go soft.  Simply get rid of the pickled onions as they are past their best, but save the vinegar drained as above and re-bottled.  It peps up the chips something wicked.