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I've used BB's, washers, clay cat littler.
My old favorite diner used pennies for the coffee pots.
I heard about BPA years ago. I've done some research and I don't think it's a big deal. There are more harmful toxins in many municipal water supplies, in the air, and in what we eat (like fish). There's a lot of literature and websites on it, so look around:
http://www.nalgene-outdoor.com/PDFs/PC_Safety-April_25_2006.pdf
http://www.nalgene-outdoor.com/technical/bpaInfo.html
I never heard about bleach being a leachng accelerant ... I just emailed them. So if it does raise the BPA leaching significantly, I may throw them out.