Charcoal-Infused Bristles, Biodegradable Bamboo Handle. Look after the environment whilst caring for your teeth and gums with Grin Charcoal-Infused Bamboo Toothbrush! Made from sustainable bamboo, our charcoal-infused bamboo toothbrush handle is 100% biodegradable. The toothbrush bristles have been infused with premium activated charcoal which has been recognized for its antibacterial and detoxifying properties for thousands of years. Alongside brushing the charcoal works to keep bacteria at bay. Available in Soft or Medium bristles (Soft bristles are recommended by dentists). Micro slim-tip bristles reach deep between teeth and along the gum-line The antiseptic properties of charcoal help to reduce bacteria build-up. your toothbrush. Charcoal naturally whitens teeth by gently removing stains without stripping away tooth enamel. 100% biodegradable handle. The PBT bristles can be recycled through our recycling program.