Baking soda
Are you poor? Do you want whiter teeth? Well, luckily there is a "do it yourself" solution to get whiter teeth in minutes!
The trick is to just go to the supermarket and buy yourself a nice load of baking soda. Now just take the baking soda , and apply a fair amount to your toothbrush. Now all you have to do is use it like toothpaste and you're all set! You will have whiter teeth.... eventually.
Do also note that if you overdo it, you can damage your teeth , so it is advisable to only do it about once a week.