Why hasn't this been invented yet? Seriously!
Anyway, pick your own flavor of toothpaste. It can't be an existing flavor. It's gotta be something new. Go for it.
[Edited on 01.12.2012 11:53 PM PST]
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[url=http://youtu.be/Sr83UrbZb1Y] My response to everything suggested in this thread [/url]