Now with bio-based bristles! Every toothbrush you have ever used is still on this planet — unless it is bamboo. Make the switch to this bamboo charcoal toothbrush and experience a genuinely effective clean that is also better for what goes into your mouth and what gets left behind. This toothbrush features medium/soft bristles made from castor bean oil and infused with charcoal to deliver a gentle yet effective clean with every brush. The bamboo handle is sourced from a fast-growing, renewable resource that supports a lower-impact oral care routine without sacrificing performance. Dentists recommend replacing your toothbrush every three months. End of Life: When your brush is ready to retire, you can put it in recycle.