Vinegar

Vinegar, or dilute acetic acid, is another chemical used for thousands of years. Roman legionaries used vinegar to kill bacteria in questionable water, adding a bit of honey to make the drink easier to swallow. The sharp odor and sour taste make it unpleasant for many, I like the stuff.
Vinegar can be used for pickling, cleaning and as a germicide. It cuts grease well without needing a water rinse afterwards. Vinegar can be substituted for lemon juice in cooking (although it doesn't provide any vitamin C) and will lower a diabetic's sugar levels when ingested along with meals. It makes a decent salad dressing alone and even better with herbs and oil. Unlike bleach, vinegar doesn't degrade with time and temperature.
A case of vinegar goes well with my preps. Why not add some to yours?