ConsumerReports.com has an especially understandable description of the plastic bottle situation. If the recycling number is 7, the plastic could be polycarbonate and leaching bisphenol A endocrine disrupters. It says recycling numbers 1, 2, or 5 are better bets. The Environmental Working Group says bisphenol A is the “signature compound in the fight for reform of the nation’s toxic chemicals laws. It contaminates nearly all Americans, it causes toxic effects at very low doses…yet the EPA has only the most clumsy and convoluted authority to control its use and reduce exposure to populations at risk.”