An interesting little study has been reported in ScienceNews from the spring meeting of the American Chemical Society. 2006 Pinot noir and Chardonnay from the Argyle Winery in Oregon were closed with natural cork, synthetic cork and three screw caps; the three screwcaps had a different lining. The chemical profile and dissolved oxygen content of the wine under each type of seal was examined at 6 month intervals over two years. In addition, volunteer tasters rated the flavor and aroma of the wines under the different closures. The conclusion? The synthetic cork and the cap lined with low-density polyethylene let in the most oxygen, but the tasters apparently could not detect any differences.