Sucking down the bottles

My daughter was born 5 weeks premature. The hospital gave us prefilled, sterlized glass bottles. They were easy and convenient, though we have since switched to plastic bottles, which can be a bit of a hassle, with sterilization. I use sterilizing bags by Medala, and sometimes wonder if glass bottles might not be the better way to go, especially after hearing about the chemical components that have been used in plastic bottles. My pediatrician, who is one of the top in my state, says that it is a personal choice, and that he does not feel my daughter is in any danger from using Avent plastic baby bottles.