so what is BPA and why is it so bad? BPA is Bisphenol A it is used to harden plastics. It is known to mess with our hormones and it interferes with our reproductive development of the children we carry.  Studies have shown that BPA can cause developmental delays as well as Diabetes Type II, estrogen increase in men (think man boobs), obesity, heart disease, and miscarriages!  Where is it?  Plastic-yes even that healthy bottled water, can goods, dental sealants,and baby bottles (wow!!!!)  NEVER and I mean NEVER heat stuff up in m'wave in plastic-especially leftovers in butter tubs!  Save all your glass containers and use them.  I save all my glass containers with lids (ask my daughter Bailey-she hates it), but she will be the first to pour her drinks (even that stupid soda she buys from plastic into glass :/ ).  Try not to buy your food in plastic---really try not to acidic foods in plastic such as tomato sauces!  I hope this helps you out!