Glass baby bottles, replaced decades ago by unbreakable plastic, are making such a comeback that parents can't get their hands on them. Retailers and online stores report a run on glass baby bottles in the last few months, spurred by reports that the most common type of plastic in baby bottles may leach a toxic chemical. Independent tests done for The Chronicle (reported Nov/2006) found Bisphenol A, a chemical that mimics estrogen, in a baby bottle and several toys. The substance is also found in the lining of food cans, some anti-cavity sealants for teeth, and electronics. In Feb/2007, Environment California, an advocacy group, released a report titled "Toxic Baby Bottles" that drew intense national media coverage. When heated 5 of the most popular brands of polycarbonate used in baby bottles, leached Bisphenol A at levels found to cause harm in laboratory animals.
