Personalized & Cheap!
I am (of course) all about doing things myself and I think that this project is a very useful one to do
Have no pictures and must borrow from internet blahhh :p
Pour 1/2 cup of baking soda into a mixing bowl.
Add 3 tsp of glycerin for every 1/4 cup of dry ingredients.
By now you should have added 6 tsp of glycerin to the mix.
Add 1/4 cup of household hydrogen peroxide and a drop of peppermint oil (or whatever else you'd like) to the mix.
Stir into a paste, store in a container that you can squeeze the stuff out of, and enjoy your home made toothpaste.