My career has nothing to do with backpacking, so no sense of competition or defensiveness should be read into anything I post. I only point it out because I'm sure that with all the misconceptions about plastics causing health issues, the manufacturers have a whole stable of attorneys telling them to keep things simple.

I organize group hikes, and have a pretty good idea that this could lead to some serious court activity if the wrong person came along. I'm sometimes accused of being paranoid because I go out of my way to avoid being considered "in charge" on group hikes.
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"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki

http://hikeandbackpack.com