(SacBee) - "Wine Buzz" focused on screw caps a couple of weeks back, mentioning a UC Davis study that's analyzing their effectiveness, along with referencing a recent line of screw cap wines from the band AC/DC. These two wines, a chardonnay and a cabernet sauvignon, both hail from Australia – AC/DC's native land – where screw caps are fairly common in the wine industry. Napa's PlumpJack Winery, whose parent company teamed with UC Davis on the study, even uses screw caps on some of its high-end bottlings.