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One vote for Nalgene, had 3-4 of the same bottle!

For a long time polycarbonate Nalgene bottles did have BPA but they've removed it. Who knows what they replaced it with.

“Nalgene subsequently adopted Tritan, a BPA-free copolyester made by Eastman Chemical, as a substitute.“ - From the Nalgene Wikipedia article.

That same article says the manufacturer of Tritan won’t say exactly what it is.