"There is a concern that styrene itself, one of the chemical components which is a possible human carcinogen, may leach into coffee or (any) hot liquid."

If your office water cooler has one of those five-gallon plastic bottles, and there's a number 7 on the bottom of it, it's made of polycarbonate and you face possible exposure to bisphenol-A, which may cause cancer.

But it was convenient and most people liked it!!! I guess they were fooled and we all suffered along with them.