Here’s a randomized trial from JAMA showing more than 1000% increase in urinary BPA after consuming canned soup: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3367259/
BPA used to be in a lot of plastics, but I think it has been phased out. Perhaps someone else can confirm or refute that.
Another source is transdermally through handling receipts. I’ve heard of at least one health conscious workplace giving their cashiers wooden tongs to handle the receipts. Best practice would probably be to email them instead. Saves paper too.
The spirit of Seth Roberts lives!