Alcoa has started commercial production of its award-winning Vino-Lock,a "glass on glass" closure system for wine bottles. Alcoa, also the world's biggest aluminium producer, will make the closures at a plant in Germany to supply European wineries. The recyclable closure looks like a decorative decanter stopper and is made with rubberised O-rings that create a sterile seal.

"The Vino-Lok closure system fills a need in the wine industry, which has sought alternatives to natural cork that meets both the quality and aesthetic demands of connoisseurs," said Siegfried Landskrone, general manager of Alcoa Metal Closures, Europe.

"We have more than 100 wineries in Europe purchasing the Vino-Lok stopper for their premier wines, and we have several commitments from winemakers in Australia and South Africa."