Make-Your-Own Toothpaste

1. Combine two to three drops of (preferably organic) peppermint oil to three tablespoons of baking soda and one tablespoon of table salt.
2. Add two teaspoons of glycerin (available at drugstores or craft stores, since you can also make soap with it).
3. Mix it all together and keep in a covered container so it doesn't dry out. You'll have fresh-scrubbed minty breath for just a few cents a week, and you won't be sending toothpaste tubes to the landfill. If you're not into peppermint, you can flavour your paste with other oils, live clove, cinnamon, or spearmint. Or you can mix them; [such as] peppermint and cinnamon together.

the eco chick: how to be fabulously green, guide to life by Starre Vartan (p.22-23) 
{ISBN-13: 978-0-312-37894-3, ISBN-10: 0-312-37894-7}