Hello there! I'm Dr. Vinifera, or "Vinny" for short. Ask me your toughest wine questions, from the technical aspects of winemaking to the fine points of etiquette. I hope you find my answers educational and even amusing. Looking for a particular answer? Check my archive and my FAQs. You can also follow me on Twitter: @AskDrVinny.
Dear Dr. Vinny,
Why does this wine have a screw-on lid, rather than the traditional cork?
—Sheila, Greensboro, N.C.
I’m a fan of twist-offs, which are easy to open, easy to re-seal, recyclable and never crumble in my hands. Many producers have switched over to screw caps and other non-cork closures as a way to ensure quality and reduce the possibility of contamination with TCA (the chemical compound 2,4,6-trichloroanisole), which can make its way into a bottle via the cork and cause unpleasant musty, damp notes in a wine.
You’ll see twist-offs topping all types of wine from affordable, everyday quaffers to some very high-end, ageworthy wines. Often folks ask how to store bottles topped with a screw cap, and the answer is, any way you want.
Do you have a question for Dr. Vinny? Ask it here...
Learn to taste wine like a pro, pull a cork with flair, get great wine service in a restaurant and more
Learn from the experts and get the most out of each sip. Take one of our online courses or take them all—from the ABCs of Tasting to in-depth seminars on Food Pairing, California Cabernet, Bordeaux, Tuscany, Sensory Evaluation and more.
Passionate about wine? Wine Spectator magazine is looking for an enthusiastic copy editor in the New York office.
Sips & Tips | Wine & Healthy Living
Video Theater | Collecting & Auctions
New! Ratings Flash