ways of whitening teeth without buying products?

I find all those teeth whiteners gimmicks any tips to whitening without spending money?
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Very simple... Once a day after you brush your teeth, gargle and rinse with an equal combination of an antibacterial mouthwash and hydrogen peroxide. Mix them together just prior to use, don't have a large amount mixed sitting around. It seems to change over time. I've been doing that every day for over a year now and my teeth are nice and white... and it's cheap. BTW, I didn't mean to imply that it would take a year to see the benefits. They come very quick. I just do it regularly to maintain the effect.
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