Enagic Kangen Water(TM)

What seems to be a very good idea: a collapsible bag, so your Kangen water is exposed to the least amount of positive O.R.P. air!
I like that we can squish out the air after pouring water from this bag, leaving the negative ions in the water instead of giving them the opportunity to use themselves up purifying airspace.
Will you just tell us this very important thing: Is the plastic these bags are made of BPA free? Dioxin free? We'd hate to save some ions by drinking water that had endocrine disruptors leached into it from the plastic. ???