In an article published March 10, 2014 in the newspaper San Francisco Chronicle, Victoria Colliver reports that BPA-free plastic sippy cups may be more dangerous than the cups with the chemical. A project by the non-governmental organization (NGO) Center for Environmental Health (CEH) found 9 sippy cups branded as “BPA-free” to demonstrate moderate to high estrogenic activity. 7 of the total 35 sippy cups that were tested showed higher levels of estrogenic activity than a cup made with BPA. The tests were carried out by the commercial laboratory PlastiPure/CertiChem and the University of California at Davis, U.S.. Sippy cups found positive in the first test were consecutively tested at the second lab. Colliver reports that the worst offenders of sippy cups were those that changed color when filling them with liquid.

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CEH (March 9, 2014). “A Warning for Parents: “BPA-Free” May Not Equal “Safe”.

Victoria Colliver (March 9, 2014). “BPA-free plastics may be less safe than those with chemical.San Francisco Chronicle.

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