Autism is a neurological disorder that despite a plethora of research the aetiology or cause of which is largely unknown. I have heard about brain damage, maternal illness during pregnancy, infections etc... as potential causes but never plastic bottles. I think once you sterilize any bottle plastic or glass before each usage the risk of your child developing anything you can prevent.
Also just a note.. make sure that the plastic is durable enough to be heated
Hope this helps.. Good luck
