Bisphenol-A is used in the production of epoxy resins and polycarbonate plastics, and it considered to be potentially harmful to human health.  Increasing fear of the potential harm being caused to babies by their bottles prompted the EU to introduce a new standard for testing feeding bottles in February 2005. Such tests have always included checks for well known dangerous chemicals such as lead and mercury in the components of the bottle, however, from February 2005 manufacturers are now obliged to test for leaching of Bisphenol-A. 

It has been known for some time that scratched and worn polycarbonate feeding bottles will leach this chemical. A report published in the UK in March 2004 showed that polycarbonate bottles of all types leach increasing levels of Bisphenol-A as they are used and sterilised.