BPA is a chemical compound used in manufacturing polycarbonate plastic and epoxy resins. It is used in baby bottles, water bottles, medical and dental devices, lenses, food storage containers, household electronics, compact discs, DVDs and countless other everyday items. Epoxy resins containing FDA/USDA approved BPA are used to coat the inside of many food and beverage cans, as well as some aluminum water bottles.
BPA is an endocrine disruptor that mimics estrogen. It also disrupts thryoid hormone function. (In tests, the estrogenic effect dispupts Pancreatic β-cell function and induces insulin resistance.) To date, more than 200 studies have found evidence that exposure to BPA, even at extremely low levels, is linked to numerous diseases and health problems because it can interfere with the body's hormonal system. It's dangerous for adults, but it's even more dangerous for infants and children because they're still developing and growing. Due to this clear and compelling evidence, regulatory agencies in the United States are taking action to lower consumer exposure to BPA.
Bisphenol A (BPA) is used to coat the inexpensive metal lids for canning jars, and that's worrisome to me. (It would be of even more concern if I had a young family and children to eat what I can.) The alternatives have been Weck Canning Jars or "Fido" Jars, but I have invested a small fortune in mason jars and cannot afford to replace them. Now I have found lids that contains NO BPA... TATTLER Reusable Plastic Canning Lids.
The lids are manufactured using a plastic compound that is safe for direct contact with food products. They utilize an FDA and USDA approved, food grade product known as Polyoxymethylene Copolymer (POM) or Acetal Copolymer. This formulation does not contain any Bisphenol A (BPA).
You use your own rings and jars, and the Tattler lids work in any accepted method of use, pressure cooker, water bath, etc. They come with a rubber ring which is also re-usable, so long as it is not damaged (cut or stretched). The price is slightly higher than the Ball canning lids (about 59¢ each unless you buy in bulk, vs 50¢), BUT they are reuseable, which regular lids are not.
The only thing I noticed in their instructions is an allowance for slightly more headspace. I think I'll experiment, since the lids are reuseable.