How long does wine last once opened?
Wines can last for a day or two once opened, though you can do a few things to help it last longer.
1) Refrigerate the wine. Wines go “off” once they have been open because they are interacting with oxygen while warm. Cool the wine and you slow down the rate of those reactions.
2) Removing the oxygen from the bottle helps to prevent those reactions from happening. 3 tricks are to:
a- Transfer the wine to a smaller bottle.
b- Use a vacuum pump to evacuate the air from your bottle.
c- Add an inert gas to your bottle so that it forms a protective blanket over the wine’s surface. These are commonly sold in many wine accessory stores.