Oh oh, it seems these polycarbonate bottles are the cause of almost everything. 
Is nothing safe anymore?



>From the Globe and Mail today:

It seems obvious that a high dose of a poison would be more dangerous than a 
lower one, but bisphenol A is creating a stir because it doesn't follow this 
seemingly common-sense rule. Researchers say this oddity results from the fact 
that bisphenol A isn't a conventional harmful agent, such as cigarette smoke, 
but behaves in the unconventional way typical of hormones, where even 
vanishingly small exposures can be harmful.

This is why some environmentalists and scientists contend that bisphenol A, 
which leaches in trace amounts from food and beverage packaging, is among the 
scariest manufactured substances in use, an eerie modern version of the vaunted 
lead water pipes by which ancient Romans were unknowingly poisoned.

Extrapolating from the results of animal experiments, they suspect bisphenol A 
has its fingerprints all over the unexplained human health trends emerging in 
recent decades hinting at something going haywire with sex hormones, including 
the early onset of puberty, declining sperm counts, and the huge increase in 
breast and prostate cancer, among other ailments.

full story:

http://www.theglobeandmail.com/servlet/story/LAC.20070407.CHEMICAL07/TPStory/Environment