imalurnin
It has quite a few chemicals in its production and complexity. Yes, there are plastics listed as food-grade, but the chemicals are still present. Since its origin is oil, these toxins migrate from the plastic to whatever oil you consume, and then your body migrates these consumed toxins to your fatty tissue. Best storage is glass, not but not produced with lead. Ancient civilizations used clay pots, but then what chemicals did the clays contain?
http://www.earthresource.org/campaigns/capp/capp-health.html
Excerpt: Male Reproductive Abnormalities/Infertility
Studies on phthalates as reproductive toxins in humans are few in number, correlational (since you can't manipulate human exposure to a supposed toxin) and very recent. The large number of phthalate compounds & sources of human exposure make absolute conclusions difficult. Nevertheless, the U.S. National Toxicology Program's Center for the Evaluation of Risks to Human Reproduction Expert Panel concluded in 2000 that DEHP has the potential to produce adverse reproductive effects in humans and expressed special concern about exposure in pregnant and breast-feeding women.(11) Scientists are asking what role phthalates are playing in the decline in human sperm production over the last half century.
http://www.mindfully.org/Plastic/Plasticizers/Out-Of-Diet-PG5nov03.htm
I hope this helps.