I recently got a huge jar of pickles for under a dollar due to overstocking. My aunt always did this with her pickle juice, and I plan to do the same: Once all of the pickles have been eaten from your jar, save the pickle juice.
The antiseptic qualities in vinegar are enhanced by spices used to make pickles. This is a page about using pickle juice for a sore throat.
The left over juice from a pickle jar can be frozen to make some tasty popsicles. This is a page about how to make pickle popsicles.