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Making wine is done with fermented fruit (grapes, pears, bannanas) in a non air environment (time and a sealed lid), if you want to change that into vinegar, you let wine mixture breathe with a air cap, like cheese cloth, to keep the critters and dust out. Voilah you have vinegar.

The same is true for aged urine, boty types have different properties, and uses to be discovered by experimentation.

Add sunlight or not.

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