Failure™ Magazine

Cork Screwed?

The satisfying pop of a cork is giving way to the crink-crank of a metal top.

Written by Vince Beiser   Filed under Life, Science & Technology

The trees also help our increasingly put-upon planet. Cork oak forests cover huge swaths of land in the Mediterranean countries of Spain, Algeria, Morocco, Italy, Tunisia, France and especially Portugal. They provide shelter to a range of plant and animal species, including endangered ones like the Iberian lynx, Barbary deer and the Imperial Iberian eagle, as well as jobs for more than 100,000 people. Almost 70 percent of their product is used to make the 15 billion bottle stoppers sold annually.

A report last year by the Worldwide Fund for Nature warns that if the trend away from corked wine continues, an area of cork forest half the size of Switzerland will likely cease being cultivated and thus be put at risk of dying out or burning up in forest fires. Losing them would be bad for the climate too: cork oaks soak up millions of tons of carbon dioxide, a major greenhouse gas.

Synthetic corks and screw tops, by contrast, require a considerable amount of energy to manufacture, which equals carbon emissions and other pollution. They’re also difficult to recycle. All of which explains why environmental groups—including the WWF and the Forest Stewardship Council—are campaigning for cork.

In addition to their green appeal, corks have tradition on their side. Their centuries-long association with wine and the elaborate ceremonies and paraphernalia that have developed around the act of uncorking have a powerful hold on many tipplers’ minds. “You can’t minimize the importance of that ‘pop’,” says Taber. “In many ways, that’s the biggest hurdle for screw caps, along with its association with being cheap.”

The cork industry is battling back, too. Major manufacturers have invested millions in recent years to screen their cork more carefully and upgrade their production processes to cut down on taint. As a result, the percentage of tainted bottles has dropped, according to Christian Butzke, a professor of oenology at Purdue University.

Artificial caps are also turning out to be less than perfectly reliable, as some winemakers have unhappily discovered. Plastic corks can fail, letting in air that oxidizes the wine. Screw caps’ more reliably airtight seals also have drawbacks. Natural corks typically allow in minute traces of oxygen, which allows high-end reds to improve with age. Screw caps not only prevent this from happening, they can also sometimes trap gases given off as the wine develops over years inside the bottle, triggering a process known as “reduction,” which gives the wine a sulphury smell.

In other words, there’s still no perfect way to seal a bottle. It’s enough to drive you to drink.

Vince Beiser is a California-based writer who contributes to The Los Angeles Times Magazine and Rolling Stone.

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