It's easy and cheap to make your own teeth whitener. Just mix hydrogen peroxide and baking soda together to make a thick paste. Apply the paste to your teeth with a Q-Tip being careful not to get the mixture on your gums. Allow the mixture to sit on your teeth for 20 minutes. Then completely rinse. You'll see your teeth get whiter after just one use of this mixture. Use weekly for several weeks to gradually get your teeth to the whiteness you desire.