Which is the best affordable Teeth Whitening products?

Hi everyone, i just wanted to ask, what are the best, most effective, and affordable teeth whitening products that can be purchased from a local pharmacy? There are so many different kinds, i don't know which ones are good or not, which ones work or not, so yea i just wanted to ask for you opinion. P.S. I was thinking about trying the Listerine whitening pen because so far from what i have seen, it the cheapest teeth whitening product, have anyone tried it before? if so, how did it work out? Thanks
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Homemade Teeth Paste - Cheap, safe and effective natural way to keep your teeth white over time The home recipes for whiter teeth is a paste consisting of baking soda, hydrogen peroxide, table salt and a dab of toothpaste. The hydrogen peroxide should not be swallowed at all. The recipes of teeth whitening paste is : 3 Teaspoons of hydrogen peroxide 2 Teaspoons of baking soda 1/2 Teaspoons of table salt Some toothpaste Made & Use with image http://www.teethwhiteningbest.com/teeth-whitening-remedies-homemade-paste.htm
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