While teflon pans are the most famous household use of teflon, they don't appear to be a significant route for these compounds getting into human bodies [1]. The main route is environmental contamination of crops and sources of drinking water, not contamination during cooking or household storage. The main sources of the environmental contamination seem to be industrial discharges, and the use of firefighting foams that contain PFOA/PFOS.

[1] See the paper linked in another comment, https://news.ycombinator.com/item?id=10046612