Teeth whitening??

im tryna go and buy one of those crest whitestrips type overnight whitening things. which one should i get? which one lasts longest? whitens most? no sideeffects? my teeth arent really bad... i just want them white
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I buy the Crest Whitestrips. The regular ones, I think that they run around $25. They work the best for me, considering I drink coffee and smoke regularly. For the price that is. I tried the new Listerine dissovlable strips and YUK! They are gross!
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