Can a plastic water bottle make you fat?

A recent article in Popular Science examined some unusual possible sources of America's obesity problem.

One theory: obesogens

The article explains that bisphenol A (BPA), a chemical found in many household plastics and food containers, might trigger responses that cause people to get fat.

"Evidence suggests that it can mimic the hormone estrogen and interfere with the body's natural mechanism for regulating fat cells."

Another related article:

Pollution can make you fat, study claims