BPA isn't a good thing, and nowadays it's very easy to avoid. IIRC all Nalgenes are BPA as are most other brands of water bottles. While I do have one or two plastic bottles I have a dozen stainless steel one. I much prefer the steel ones, if for not other reason than that I can boil in them.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman