Make toothpaste and mouthwash out of nature!
For the toothpaste:
For the mouthwash:
To make the toothpaste, crush up some charcoal and add a little bit of water to make a paste. Smear a bit on your teeth, and then chew on a birch twig. Rinse well with water.
To make the mouthwash, crush/pulverise a handful of pine needles using the stone, then add boiling water. Leave it for 5 minutes and then strain the liquid/remove the needles. The liquid will be mildly antiseptic.