If the vinegar is not polluted, it could last for weeks to months long enough to sustain consumption during the confinement period. Make sure to reboil it every 2-3 days. This way, you can just leave it out and not refrigerate it. Do not leave the eggs in the vinegar stew for too long, recommend consuming the eggs the same day as you cook it. Also, remember to use clean and dry utensils each time you get the pork trotter ginger stew. Therefore, it doesn’t contaminate the stew.