This is an easy way to make yourself a jar of pickles by just “reusing” your old pickle juice. Once your current pickle jar is empty, save the juice. Then take a regular cucumber, slice it thinly, and then put the slices in the jar with the liquid. Let it sit in the refrigerator for a few days and that's it – you have a new jar of pickles!
This trick actually works more than once, but eventually you'll have to replace your jar and start over again. Want to experiment? Try adding other thinly sliced veggies like carrots or peppers for a bit of variety.