First you want to pour half a cup of baking soda in a bowl that you can mix in. Here it gets complicated: Next add three teaspoons of glycerine for every one fourth of a cup of dry mixture. Then, add one fourth of a cup of hydrogen peroxide that one uses at home, and one drop of peppermint oil. Mix the peroxide as well as the baking soda together until it is pasty. Finally, make sure you store the toothpaste in a small plastic container so that it won’t dry out.