It is down-cycled and turned into lesser things, while a glass bottle can be a glass bottle again or can be used again -- a plastic bottle can never be a plastic bottle again.
"Downcycling," najniži stupanj povrata materijala u manje vrijedne predmete. Dok staklena boca ponovno može biti staklena boca, ili se može ponovno upotrijebiti, plastična boca nikada ne može ponovno biti plastična boca.