These genuine bamboo toothbrushes are differentiated by an animal so that the whole family has their own. Offering them to you in batches allows us to reduce shipping costs, the cost per toothbrush, and all without cutting back on the exemplary quality. As a reminder, bamboo is a plant that is capable of growing 1 meter per day and without fertilizer. It is therefore an ideal biodegradable material for producing everyday objects that are consumed regularly. This is even truer for toothbrushes since conventional plastic toothbrushes come from finite resources and take over 500 years to degrade.