Natursutten
Built its reputation on the benchmark plastic-free pacifier — a single molded piece of natural rubber with zero plastic and zero silicone — and that commitment is real. The glass bottles carry the same intent, pairing borosilicate with natural rubber nipples and seals, but plastic returns where the mechanics demand it: the screw ring, anti-colic valve, and travel cap are polypropylene, which does put plastic in the milk path. The brand is honest that the bottle can't yet match the pacifier's purity.
How clear are their specs?
States the real materials — natural rubber, borosilicate glass — and openly lists which bottle parts (screw ring, valve, cap) remain polypropylene.
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Documented so you know what to skip — each still has a full breakdown and sources.