BPA stands for bisphenol A, which is an industrial chemical that is used in the production of many consumer products, including plastic food containers, water bottles, and the lining of metal cans. BPA can mimic the hormone estrogen in the body and has been linked to a variety of health concerns, including developmental problems in children, infertility, and cancer. Although many manufacturers have phased out the use of BPA in their products, the chemical can still be found in some consumer goods, such as in the coating of various high-risk non-stick coatings. Avoid such units at all costs.