I'll certainly not get into a discussion with a bio anylatical chemist on the whys and wherefores of NPS storage mediums. ( out of my depth in every respect)

My little contribution refers more to the posts that express an underlying antipathy to plastics in general.

I use plastics to get my "booty" ( glass for the freeze precip.) I eat well, excercise well, don't smoke or drink excessively . It doesn't phase me in the slightest that 2 times a month I could be potentially inhaling mollecules of synthetic polymers into my lungs. Part of my profession involves spraying toxic plant proctection chems. Everything tends to get put into perspective relative to the enviroment we find ourselves in.