BPA is nasty stuff. This study, shows how BPA increase from those who eat canned soup, in just 5 days. Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics found in water bottles and food storage containers. BPA is known to disrupt the endocrine system in the human body and may contribute to weight gain, metabolic syndrome, prostate gland, cardiovascular disease, hormone sensitive cancers such as breast and prostate, and immune system dysfunction. Harmful exposure levels are not known at this time and are currently being researched. The amount of BPA that leeches into food and drink varies depending on the age of the container, the temperature of the food/drink, and the type of container.
Did you also know that BPA is related to free radicals? http://www.ncbi.nlm.nih.gov/pubmed/12865045
This article showed how BPA Injected into mice, increased hydrogen peroxide in the mouse organs. Hydrogen peroxide is a very strong free radical molecule.
Need more confirmation, see http://www.sciencedirect.com/science/article/pii/S001393510900084X