A person opening a bottle of wine
How To Store Opened Red Wine So It Stays Fresh For Longer
To preserve the taste, aroma, and overall quality of an opened bottle of red wine, it should be protected from the three elements that cause it to spoil: Oxygen, light, and heat.
Snugly resealing the bottle will help keep oxygen out. Storing it in a cool, dark refrigerator will slow down the oxidation process and help preserve the wine's flavor and aroma.
Vacuum pumps and gas preservation systems can also help. Upright storage and minimizing air exposure by using smaller containers can extend a wine's freshness for up to five days.
Tannin-rich wines like Cabernet Sauvignon tend to last longer than older and lighter colored varieties. Signs of spoilage include a sour taste, vinegary aroma, and brownish hue.