Corks seal the wine in the bottle which severely retards the oxidation process, allowing the wine to age and evolve slowly over time. This takes place because corks, or better put, quality corks allow a minimal amount of oxygen into the wine. ... Cork oak trees are grown primarily in Portugal.

Are wine corks necessary?

Why wine bottles typically use cork

There are lots of reasons to use cork instead of a screw-cap. ... But there's a drawback: Occasionally bad cork can get into the wine, something called "cork taint." It's not going to harm you necessarily, but it will make the wine taste or smell a little funky, like moldy cardboard.

What is the purpose of a cork?

This is the same reason cork works so well to age wine — its molecular structure makes watertight seals easy, but lets tiny bits of air move in and out, allowing the flavor and aroma molecules of wine to evolve and become more complex over time.