Truthbrush This travel case is the perfect way to take your bamboo toothbrush with you wherever you go! Carefully made from sustainably sourced, polished bamboo. There's a small ventilation hole at the base. It's a natural product, so sizes and markings vary. Truthbrush is a women-owned, certified B-Corp. They are proud to be fellows of the School for Social Entrepreneurs and members of 1% for the planet.