Recently my friend Erin clued me into the Bisphenol-A (BPA) and its potential leaching out of certain plastics. There is concern that this chemical can be a possible carcinogen and yet it is used in many infant and children's items. Canada has recently banned the use of this chemical in baby items and stores in the United States are banning BPA too. Amazon has even set up a BPA-free Store on its website.
Below is a good summary article and a chart that helps makes heads and tails of this plastic issue.
The Green Guide: Summary of the Debate Surrounding BPA
Plastic Products at a Glance Chart
I am still trying to come up to speed on this issue while not panicking that R used Avent bottles (one of the worst BPA leaching offenders) for an entire year.