We used Avent bottle for our first born and when the recall came along in Canada, we brought all the Avent products we had to Zellers and had a store credit. I found some glass bottles that were compatible with the Avent nipples (which don't contain the BPA) they are from the brand Chicco.
The BPA is made active by washing with hot water, boiling or steaming. The BPA stays in the bottles and when milk is then placed in the bottles it comes in contact with it and then goes to your child when feeding. Once active the chemical is always present. At least that's what I heard.
Avent had a promo a while back that you could call or sign up and get a BPA free sippy.
to me, if the companies are making the switch and Canada has decided to take those products off the shelf, there is something to think about. then again, how long have they been using this product to create bottles and how many children have been exposed and shown signs of problems. No matter we didn't want to risk it and made the full switch so that if we ever need to bottle feed our week old daughter, she'll be using safe glass bottles.