Comotomo
Specs clearly published comotomo.com ↗
Comotomo's designs lean heavily on food-grade silicone rather than hard plastic, which sets them apart from most mainstream baby brands. The silicone baby teether in particular is a single molded piece of 100% medical-grade silicone with no hard plastic - so it is silicone-only rather than fully plastic-free. Their bottles pair a silicone body with plastic collar and cap components, so plastic content varies by product.
How clear are their specs?
States the teether is 100% medical-grade silicone and free of BPA, PVC, phthalates, and nitrosamines, and that it is a one-piece design - a simple, fully-disclosed single material.