[tiredmom]

Study: Most Plastics Leach Hormone-Like Chemicals : NPR

The team concentrated on BPA-free baby bottles and water bottles, Bittner says, "and all of them released chemicals having estrogenic activity." Sometimes the BPA-free products had even more activity than products known to contain BPA.

"We've long cautioned consumers to avoid extreme heat and cooling for plastics, to discard scratched and worn plastics and we feel like this [study] validates one of our many concerns," she says.