Nspire Bamboo Toothbrush-Pack of FourNational Geographic notes that more than 448 millions tone of plastic is produced every year find their way into the oceans, destroying marine life and the planet decades after it is discarded. Bamboo toothbrushes are a sustainable alternative to plastic brushes. A biodegradable toothbrush made from organically grown bamboo. the bristle is made of biodegradable nylon 4 and caster seed oil and infuses charcoal or bamboo fibre. Biodegradable bamboo