What is a corked bottle of wine?

Keeping a wine bottle sealed is probably the most important factor when it comes to maintaining a good wine.

A cork is essential, as it keeps oxygen out of the wine bottle. If a bottle of wine is not airtight then it may become oxidized and undrinkable.

Traditionally, the only corks worth considering were those actually made of cork. Recently, however, many wine experts have recognized that cork may actually cause more problems than it solves.

Cork, due to its malleable nature may have imperfections; these can result in the seal of the bottle not being as airtight as it could be therefore, spoiling the wine. In an attempt to avoid this problem, modern cork manufacturers may treat the cork with a chemical called TVA. Unfortunately, this chemical can cause the wine to taste and smell a little damp and musty.

Having said this, cork is able to expand to fully fill the neck of the bottle, which still makes it the preferred option for special wines that need to be stored, over a long period of time.