Just wondering if there are any systems out there that do not use a plastic pouch, which likely leech chemicals into the water. I haven't found a camelback type system that did not make the water taste like plastic in high heat environments, and even if it doesn't have a foul taste, leeching is likely still occurring.
I currently carry a stainless bottle (Klean Kanteen) in place of the bladder inside the backpack, but obviously not nearly as convenient. I will gladly trade convenience for purity if there are no better options though. Of course there's not much that can be done to avoid having a plastic tube, at least I don't believe there is, but that can be cleared between uses to minimize contact.
I currently carry a stainless bottle (Klean Kanteen) in place of the bladder inside the backpack, but obviously not nearly as convenient. I will gladly trade convenience for purity if there are no better options though. Of course there's not much that can be done to avoid having a plastic tube, at least I don't believe there is, but that can be cleared between uses to minimize contact.