Glass wine "corks"
I'm just starting to hear and read more and more about glass wine closures made by Alcoa. They can be recycled, and, more importantly, they stop oxidation and prevent cork taint.
Whitehall Lane in Napa has started to use them for their Reserve Cabernet, and I have also heard of other wineries following suit.
We'll see if they become more popular than synthetic corks and/or screw caps. They certainly look attractive.