I have shared other reports about the dangers of BPA as well as a recent report about the dangers of plastics that are using alternatives to BPA. Guess what–none of them are good for us. PLEASE, avoid plastics as much as possible. Use glass as much as possible for your drinking water. but, yes, I use stainless steel when camping/hiking or when the risk of breakage is high (I just figure that some day we may discover some sort of toxin in the metal, too, and try to avoid it). Read more about the non-BPA plastics here.