31. Currently, ten U.S. states have "bottle bills"; i e., container deposit laws. Many of those states are also campaigning for updates and expansions, and still others have active campaigns for new bottle bills. For example, Michigan bottling law requires that people get a refund of ten cents when they return an empty bottle or can. Michigan state senator Rebekah Warren has introduced legislation to expand the Michigan Beverage Containers Initiated Law of 1976, thereby opening up debate about what direction the potentially new legislation should take