California Supreme Court allows broader warning labels for bisphenol A FacebookTwitterEmail Items at a natural products store for children are marked as free of bisphenol A. California will broaden its warning labels.Brant Ward / The Chronicle 2011 California will broaden its warning labels for bisphenol A, a chemical widely used in plastic cups and other food and drink containers, after the state Supreme Court rejected an appeal by the chemical industry Wednesday. Since 2015, the state has required labels on products containing bisphenol A stating that it can cause reproductive harm in women...