This is a two part question about wine?!

This is a two part question about wine?

First, what is a Sulfite? Second, What is thepurpose of a cork? I bought some wine that didnt have a cork. Does that have anything to do with the quality of the wine?

19 hours ago
But what is a sulfite?

First the cork. A cork is just a cap/stopper. It is the soft bark of a tree. It was used for its ability to seal jugs and bottles. In the past people would judge a wines quality by whether it had a cork or not. Today that is not the case. Many very good quality wines around the world are using synthetic plastic-corks. Also now in vague is twist caps for the same good wines.

All wines contain sulfites.

Sulfites are created naturally as a byproduct of fermentation in the wine-making process, and they have also been added by wine makers for decades as a natural preservative.

Unfortunately, a very tiny proportion of people are allergic to sulfites, a dangerous and potentially fatal allergy.

Sulfite-sensitive individuals who have survived into adulthood know what they must avoid, a list that includes wine, fruit juice, sausages, salad bars and many other foodstuffs that routinely use sulfiting in production.

Although the threat is small, the U.S. Food and Drug Administration (FDA) has required since 1987 that all foodstuffs containing more than 10 parts per million of sulfites -- which includes virtually all wines -- must bear a warning label.

Wines made in the U.S. may contain as much as 350 parts per million, an extreme level, rarely attained except perhaps in cheap jug wines, at which point the sulfur may be perceptible as a pungent aroma resembling a burnt match. (Some processed foods, in contrast, contain up to 6,000 parts per million.)

Relax do not worry about sulsites or corks just...enjoy.