The problem with bisphenol-A carbonate polymer is not so much that it is leached from the material but that the polymer very slowly can undergo hydrolysis, which is much faster at higher temperatures. The linkages in can liners are supposed to be ether linkages which are not ordinarily subject to hydrolysis, the potential problem here is residual bisphenol-A left from manufacture.
Unlike some other contaminants that are oestrogens, bisphenol-A has very high activity, so only traces have the potential to cause harm.
The so called phyto oestrogens in (very) many plants do not ordinarily produce problems in humans (and as animal food) unless consumed in massive quantity, most of these compounds are relatively weak. I suspect some people are more subject to these compounds than others. Fad diets are NOT good!
A large fraction of containers used to contain liquids for drinking are made of polyethylene or polyethylene glycol terephthalate. Polyethylene is extremely chemically stable and insoluble. Polyethylene glycol terephthalate is fairly stable, and when it undergoes hydrolysis the products are considered not toxic at the tiny dosage that could be produced from this.