Bisphenol A, or BPA, is a chemical commonly found in hard plastic bottles such as Nalgenes and other everyday plastic products. However, increasing concerns about BPA's alleged toxicity has caused Nalgene to stop using it to make bottles.

Retail giant Wal-Mart and water bottle maker Nalgene are taking steps to phase out the use of the plasticizer Bisphenol A, only days after a major report linked the omnipresent chemical to a range of possible hormonal and other health…

By PBS News Hour

The chemical bisphenol A, known as BPA, is used to make many common plastic products used in U.S. homes, including baby bottles. Scientists and expert panels have been tasked with determining whether BPA has adverse effects on human health.