(Wines&Vines) - While consumers find plenty of room for argument about which wine is No. 1, winemakers and suppliers can be just as combative about which closure is best. As part of its ongoing Wine Flavor 101 series of lectures and seminars, the University of California, Davis, gathered representatives from the cork, synthetic and screwtop camps for a forum held Thursday on campus. Late in the afternoon during a panel discussion about the sustainability of closures, Tim Keller, founder and CEO of VinPerfect, the new company that has patented an oxygen-permeable liner for aluminum screwtops, made an aggressive pitch for the sustainability of aluminum closures vs. the cork industry’s sustainable claims.