Thanks for your comment rwh (w00t)
I'm trying to save the polyesters as well.
But I found out that my PET bottles are made from (wait for it)
PolyEthyleneTetephthalate.
Try saying that with a few Jatz in your mouth.
Reference: Wikipedia
Sorry I don't how link to it.
But as we know, search and yea shall find, (old forum proverb).
Roger