How long does a opened bottle of wine last for cooking purposes?

An opened bottle of wine will last about 3-5 days in the refrigerator for cooking purposes.

Here are some factors that can affect the shelf life:

* Type of wine: Red wines tend to last longer than white wines.

* How it's stored: Store the wine tightly sealed in the refrigerator.

* Quality of the wine: Higher quality wines tend to age better.

Important Note: While the wine might be fine for cooking, it's best to avoid using it for drinking after 3-5 days as its flavor and aroma will have diminished.

Here are some tips for preserving opened wine for cooking:

* Transfer to a smaller container: Pour the wine into a smaller container, like a mason jar or a wine bottle with a tight-fitting stopper. This reduces the amount of air that comes in contact with the wine.

* Add a little nitrogen: You can use a wine preservation device to pump nitrogen gas into the bottle, which displaces oxygen and helps preserve the wine.

* Freeze leftover wine: You can freeze leftover wine in ice cube trays for later use in sauces and stews.

If you're unsure about the quality of the wine, it's always best to err on the side of caution and discard it.