Is buying a BPA-free reusable plastic water bottle as healthy as buying an aluminum or glass water bottle?

The major concern I hear with reusable plastic water bottles is their BPA content. But with the proliferation of BPA-free bottles, I would like to know if there are additional reasons to favor a reusable bottle made from another substance. Or is there anything I should know about reusable bottles made from metal, glass, etc?



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