I completely bottle feed my 4 month old and when I was changing bottles, ( to a bigger size), a while ago I did hours of research into BPA free bottles. I got quite pedantic about it!
I ended up with MAM ultivent bottles as they were the only BPA free ones I could find locally, (Australia), apart from Medela, (but by now these were too small).I like to touch, pull apart, etc anything I buy for the LO, so "Dr. Browns" was no good as only on net here as were "Greentogrow" where I am living.....
I was very concerned about the effects of BPA but yes the problem lies in heating the milk IN the bottles so sterlising should pose no concerns. I have some BPA bottles now, (tommee tippee) as my LO preferred them. I definitley DONT heat them and she only drinks room temp milk from them
I think it's worth remembering too that BPA is in many everyday plastics, not just baby products.....takeaway containers,(that get reheated in the microwave,) drink bottles,(which we often leave in the car where they get warm in the sun, then we drink from then later!) Not only are out bubbies important but, so are we! Our naturopath warned us against heating ANYTHING in plastic containers as this can effect your fertility!
The health effects are well documented, but a little common sense also goes a long way and there are ways around not heating bottles such as Avent, (which is a very trusted brand that I too bought), so that you don't have to replace your entire range, tres expensive!! Having said that, if one country thinks there's enough of a health risk to ban the chemical, you have to wonder why countries like US and Australia are so slow to follow suit
OK I'll get off my soap box now