What type of cork is the best for preserving wine? This is a question that many wine lovers ask themselves when choosing a bottle. There are different types of corks, each with its own advantages and disadvantages. In this article, we will review the main ones and explain how they affect the quality and taste of the wine.

The most common types of corks are natural, synthetic and screw cap. Natural corks are made from the bark of the cork oak tree, which is harvested every nine years without harming the tree. Natural corks are biodegradable and recyclable, and they allow a small amount of oxygen to enter the bottle, which can help the wine to age and develop complex aromas. However, natural corks can also be affected by a fungus that produces a chemical called TCA, which can make the wine smell and taste like wet cardboard. This is known as cork taint, and it affects about 5% of the bottles with natural corks.

Synthetic corks are made from plastic or rubber materials that mimic the appearance and elasticity of natural corks. Synthetic corks are cheaper and easier to produce than natural corks, and they eliminate the risk of cork taint. They also seal the bottle tightly, preventing oxygen from entering or escaping. However, some critics argue that synthetic corks can impart unpleasant flavors to the wine, or that they can make the wine lose its freshness and character over time.

Screw caps are metal caps that are twisted onto the neck of the bottle, creating a hermetic seal. Screw caps are very convenient and easy to open and close, and they also prevent cork taint and oxidation. They are often used for young and fruity wines that are meant to be consumed within a few years. However, some people associate screw caps with cheap or low-quality wines, and they may not be suitable for wines that need to age for a long time, as they may prevent the development of tertiary aromas.