Miswaaks (twig toothbrushes) from the following (poisonous) trees are not permissible:
The following types of Miswaaks are recommended:
Doesn't the idea of the rough looking (ouch!) miswaak inspire you to stockpile as many "unnatural" toothbrushes as you can afford?
Offered by Di.
Bamboo shoots are edible; and I have, bye the way, made a toothbrush from Bamboo ... and am here to say so 25 years latter.
Offered by Ron.