Food-safe plastic is for me a commercial concept, especially with hot temperatures.
Look at "Migration of chemicals from plastics".
http://www.ava.gov.sg/FoodSector/FoodSa ... /index.htm
"The exposure to phthalates is generally very low and there is no direct evidence that these chemicals affect male reproductive health."
That's only for correctly produced plastics.
After all, if plastic is safe enough to make children toys...