GoodMouth is a dental hygiene subscription box that you can order monthly or quarterly. We get the shipments every three months, since we don't go through toothbrushes faster than that, but there is a lot of flexibility.
For every order, GoodMouth donates dental services to people in need as well. That, combined with the quality of their products and the companies they work with, makes this a definite must for me as a subscription box.
