Here’s a blog teaching how to make homemade soda! No bad stuff in it… it can be rather healthy, actually! I think the carbonation isn’t as strong and the flavor is unique, but you can add your own fruit choices or other flavors to make different kinds of pop from home and feel good about drinking it.
http://www.naturallyknockedup.com/2009/07/try-it-tuesday-water-kefir-kefir-soda.html