A bottle of Blended Learning wine produced by students in Washington State University's Viticulture and Enology program is shown Thursday, May 7, 2015, at the Washington State Connections store in Seattle. For the past six years, every wine made by a WSU enology student or researcher has come with a screw cap instead of the traditional cork. And aluminum screw caps have started to replace corks across the industry, as winemakers seek to avoid a problem called cork taint. (AP Photo/Ted S. Warren)
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