Is your glass being harassed? WineGuard® Wine Glass Cover to the rescue! July 2, 2021June 30, 2021 by MyVanCity “The WineGuard is a wine glass cover I highly recommend using. It keeps fruit flies out of your glass. It is a perforated stainless steel mesh lid that allows the wine to aerate while in your glass.” Roger Gillespie, Hester Creek Winery.