C.H.
I also use the Dr.Browns plastic bottles and I love them. I have no problem with a "plastic taste". I am not even sure if they still sell glass bottles. My daughter is 10 months old and I see how she treats her bottles. I would be afraid of letting her feed herself a glass bottle. If your son is 1 year old he will be off bottles soon anyway. I really wouldn't waste the money buying all new bottles at this stage, maybe find a cup that he really likes and start to make the transition.