Here is a link to a nice discussion on Stelvin type closures, among
others. I knew New Zealand wines were heading this direction and
thought this presentation was very well done.

These closures require specialed equipment, they are not comparable to
the standard plastic screwcaps commonly available to home winemakers.

I thought some of you might be interested in them, so here is the link:

http://www.kumeuriver.co.nz/images/m...esentation.ppt

(I ordered some Altecs for testing so am back into looking at closures
again. So far I like the twin tops and Nomacorcs better than
Supremecorc, Guardian and aggomerated.)

Joe