The list author says: "If you're looking for BPA-free food, you know why you're here. (And if you don't, please go Google it--it's the sort of thing that sounds like the province of the aluminum-foil-hatters until you realize the information is from the FDA.)"
"This is your source for 'canned' tomato soup without BPA. It's also gluten-free. Any food packaged in boxes like this is BPA free. In fact, you can get tomato sauce in little boxes like this in the Mexican food aisle of most grocery and variety stores. (Look for things marked, "TetraPak")"