Wine knowledge: how to preserve the unfinished wine after opening? How to preserve the unfinished wine after opening is a problem often encountered by wine drinkers.

  method one:

Re-cork the wine bottle with a clean cork and place it in the refrigerator to reduce oxidation. In the case of red wine, taking the wine out of the refrigerator and letting it sit long enough to return the wine to 18°C before serving is surprisingly effective.

  Method Two:

Pour the remaining wine into a 375ML wine bottle (half bottle), and then re-stop the bottle. This method is a little more complicated, but it's by far the best way you can do it. If the wine bottle is a screw stopper, then methods 1 and 2 are more convenient to operate.

Method three:

Use an inert gas displacement device that extracts all the oxygen from the bottle. This method is very popular in the European restaurant industry, but I am not convinced yet. You would need to fill up a lot of inert gas first to displace the oxygen remaining in the top half of the wine bottle, and I highly doubt that the container of this device can hold enough inert gas to effectively displace the oxygen in several bottles.

Method four:

Use devices that protect the wine by removing oxygen from the wine without oxygen. This vacuum pump can only remove 2/3 of the oxygen, so the remaining 1/3 of the oxygen remains in the bottle to destroy the wine. But when you use this device to remove the oxygen from the wine, you are also taking away the sulfur dioxide that winemakers have added to keep the oxygen from destroying the wine. In this way, the remaining 1/3 of the oxygen will still destroy the wine, and the wine is now more vulnerable than before due to the antioxidants being drawn away. Plus, you're taking the carbon dioxide out of the wine, which is supposed to unnoticedly enhance the taste and texture of non-oak-aged white and red wines. (Article source: Brand Network)