The world’s most sold – for a reasonthe original that took the world by storm. cleans just as well as a plastic toothbrush but made from Mother Earth’s best invention, bamboo. equipped with the highest quality nylon bristles to ensure dentist-approved results, this iconic toothbrush has to date sold in excess of 35 million pieces. Details. Biodegradable handle. Vegan. Cruelty-free. Developed by dentists