Hi
Yes, they use bottles with BPA in them; Dr. Brown's and Avent are (unless explicitly stated) not BPA free.
I just went to the Wehrli bebehaus at Schaffhauserplatz to take care of this very issue; I found that they carry:
_ Medela plastic BPA free bottles (sorry, I nabbed the last one

; I'm sure they'll restock soon enough though)
_Bibi glass bottles (2 sizes)
_Bebjou glass bottles (2 sizes)
Bottles cost between 7-11 chf. There may be other stores in CH that carry more brands but as other posters have stated, glass would seem to be the way to go!