Brush with Bamboo

Specs clearly published Made in China brushwithbamboo.com ↗

This is the textbook castor-nylon case. The handle is bamboo and the marketing is heavily eco, but the bristles - the part in your mouth - are Nylon-11/1010 made partly from castor oil. "Plant-based" nylon is chemically still nylon: not compostable, and it sheds microplastic. To the brand's credit it discloses the biobased percentage and that the bristles are not biodegradable, but the bamboo handle is a distraction from a nylon contact surface.

How clear are their specs?

Unusually forthcoming for a castor-nylon brand - it publishes the biobased percentage of the bristles and states that they are not biodegradable, so the materials are documented even though the marketing frames them as eco.

Products to avoid

Documented so you know what to skip — each still has a full breakdown and sources.

Biobased Bamboo Toothbrush

Mostly plastic Not recommended

The marquee castor-nylon case - a bamboo handle marketed as eco, with "plant-based" bristles that are chemically still nylon in your mouth.