Brush with Bamboo's Adult 4-pack includes 4 adult toothbrushes. Every part of this product is plant-based: bristles, handle, wrapper, and box. *Soft bristles are made from a base of 62% castor bean oil. Bristles made in USA. *The handle is made from 100% bamboo (wild harvested). *The wrapper around the toothbrush is plant-based. *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. Green America Certified. Vegan.