Every part of Brush with Bamboo’s Adult toothbrush is plant-based: bristles, handle, and box. * Standard soft bristles made from 100% Castor Bean Oil. USDA Certified 100% Biobased. Bristles made in the European Union. * FSC® certified bamboo handle. * The box encasing the toothbrush is made from paper – no tape or glue is used. * Your bamboo toothbrushes can be used for just as long as plastic toothbrushes. * USDA Certified Biobased. Green American Certified. Vegan. BPA-Free. Natural and Non-toxic.