New research found that being exposed to PVC (polyvinyl chloride) plastic, commonly known as Vinyl can lead to fat storage predisposition. "The study published in Environmental Health Perspectives, exposed pregnant mice to (TBT) a chemical found in PVC plastic and marine hull paint". This resulted in children, grandchildren, and great-grandchildren of the mice to express fat specific genes, and retain fat in body and liver even though they weren't exposed to PVC. It's not known for sure that people react the same to the chemical yet, but the probabiliy is big. PVC can be found in food packaging, like meat, and cheese wraps, cookie and cereal boxes, candy wrappers, water bottles etc. as well as many boxes for electronics, toys and other devices.