No one seems to have answered Tigerchips' question about what IS soda glass. Strictly, there is no such thing. The term is used (too often imho) as an abbreviation of "soda-lime", which is itself an abbreviation of the correct "soda-lime-silica", which describes accurately the main constituents. The vast majority of everyday glass comes under this description. Windows, bottles and all everyday household glass (apart from "Pyrex") of whatever colour are included. Potash (usually) and lead replace the soda and lime at the upmarket end of things.
Tigerchips, there IS a glass which contains no lime or lead, just soda and silica. Sadly, it dissolves in water. Our grandmothers used it for preserving eggs under the name "waterglass".