Ko ngā putea mata kirihou te nuinga o te whakamahi:
PP (Poroporopīrene):he pakari, he māmā, he pai hoki mō ngā hua
PE (Polyethylene):ngāwari, ā, he iti te utu
Ngā kirihou e ahu mai ana i te koiora, ngā kirihou pirau rānei:e puta mai ana nā ngā ture taiao