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Plastic soda and water bottles are made of polyester, which is not the same thing as polycarbonate. Yes, the same polyester they use to make clothes. I'm not hearing anything bad about polyester here.
Polycarbonate is Lexan (TM), which is what they use to make Nalgene (TM) bottles, car headlight lenses, and "bulletproof" glass.
Who needs a bulletproof water bottle? It's just silly.