Sean has gone off the to the Wisconsin to start Green Glass in North America.  Being America it is a bigger factory than the UK !   You can check out their web site at www.greenglass.com

Green Glass in America is produced in a slightly different way.  Instead of using the bottom of the bottle as a base for the glass they cleverly heat and twist the neck of the bottle and reform it into an elegant stem for the glass.  Check out all the designs on their web site...