Vinlock (Vino-Seal)
There is little information out there about the vinlock closure. It is a glass stopper with a plastic seal. I am unsure of the composition of the plastic, or whether the compound has had extensive testing to ensure safety. Like Diam closures, there is little evidence of its long term performance.
See also Cork, ProCork, Diam, Screw Cap, Vinlock, Zork, Technical Corks, Synthetic Corks, Crown Seal