Where has this been shown? I have never seen this. Are you saying that there's plastic particulates that leach into the water, or some kind of residue?
That's easy to test too. Run the boiling-to-dryness test once with tap water and once with bottled water. Try the same with a Brita filter pitcher. I don't think that you will observe any more plastic in the bottled water than in the tap water.
