Vinegar ( suka ) is a preservative. It is sour, acidic, and sharp. Water ( tubig ) is neutral and life-giving. To "water" something with vinegar is an act of cruel irony. You are giving it liquid, but you are giving it the wrong liquid—one that burns.
A columnist for The Manila Times (July 12, 1987) wrote a humorous piece titled "How to Save a Dried Lumpia." The closing line was: "Kung uhaw ang lumpia mo, huwag mag-atubiling diligan ng suka. – 1987." diligin ng suka ang uhaw na lumpia -1987-
Each refuses to give it water. Finally, a disillusioned revolutionary gives it a dipper of suka , saying: "Diligin mo ‘to. Ganito ang lasa ng rebolusyon—maasim at masakit sa tiyan." Vinegar ( suka ) is a preservative