“On the bottom you'll see a little triangle with a number seven in it. I would actually avoid those because it's most likely they've got BPA in them. Number three and number six I would avoid as well. It doesn't mean to say that all plastics are not good, but there are companies choosing to use stabilised plastics,” McCartney said.
http://au.news.yahoo.com/today-tonight/latest/article/-/12940942/bpa-chemical-dangers/
