With a consumption of 4 toothbrushes per year, we end up with 332 million toothbrushes in Germany alone that end up in the trash every year. Plastic consumption in Germany is still rising, and over 60% of plastic waste is not recycled but burned for energy. The bamboo toothbrush is biodegradable except for the bristles, so you can dispose of it in the organic waste garbage can or on the compost pile after removing the bristles.
Bamboo toothbrushes also have a better eco-balance than plastic toothbrushes. It is shown, for example, in a 2020 study comparing different toothbrushes. The entire life cycle (even including water consumption when brushing teeth) was taken into account. Twenty bamboo toothbrushes (i.e., five years of brushing teeth) emit 4.22 kg of Co2 equivalents. Twenty plastic toothbrushes emit 25.6 kg Co2 equivalents, which is 6x more than the bamboo toothbrush. The bamboo toothbrush performs best among the toothbrushes tested in the study.