Hteink.min [creativecommon license] via Wikimedia CommonsBisphenol A (BPA) is a chemical found in polycarbonate plastic and other food containers (including baby bottles and reusable water bottles). More than 8 billion pounds of BPA are produced each year, and the chemical can be detected in almost every water body. Human exposure to BPA, largely through diet, is practically unavoidable, and measurable quantities of the chemical exist in more than 90% of people in the US.