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I bought a water bottle that said it was BPA free, but it still has a #7 recycle symbol and contains Tritan.
'Tritan' is the replacement chemical for BPA/BPS in some #7 polycarbonate water bottles. Although Tritan does not contain bisphenol in any of its forms, it does contain a 'phenol' which is the component that is estrogenic. Tritan is the trade name for 'triphenyl-phosphate'. Triphenyl-phosphate is the ester (triester) of phosphoric acid and phenol and is used as a plasticizer and a fire retardant in a wide variety of products.
A peer reviewed study states the following about Tritan:
“Our data showed that some (4/14) unstressed and stressed BPA-free thermoplastic resins leached chemicals having significant levels of EA, including one polystyrene (PS), and three Tritan™ resins, the latter reportedly EA-free. Exposure to UV radiation in natural sunlight resulted in an increased release of EA from Tritan™ resins. Triphenyl-phosphate (TPP), an additive used to manufacture some thermoplastic resins such as Tritan™, exhibited EA in both MCF-7 and BG1Luc assays. Ten unstressed or stressed glycol-modified polyethylene terephthalate (PETG), cyclic olefin polymer (COP) or copolymer (COC) thermoplastic resins did not release chemicals with detectable EA under any test condition.”
Triphenyl-phosphate (Tritan) is a known xenoestrogen and by avoiding polycarbonate plastics that are represented by a #7 recycle symbol on the container, you can avoid its estrogenic effects. All polycarbonate plastics are labeled with the #7 plastic symbol, so in this case the number 7 is not your lucky number.
To learn more read my blog "The 7 Deadly Estro-Sins".