BPA and similar are used in the lining of some food and beverage packaging to protect food from contamination and extend shelf life
BPA is now removed from many plastics but “BPA-free” may just mean they have been substituted with inadequately researched substances - often another BPA-like one
Examples
Bisphenol A (BPA)
Potential adverse effects
fetal effects
the combination of BPA and retinoic acid (RA) appears to trigger abnormal brain and facial development by overstimulating RA-responsive genes, particularly a group known as HOX genes 1)