The finger-mounted toothbrush looks like it's simply a brush glued to a finger-sized condom. However, no matter how ridiculous this invention may be, its practical function cannot be denied. It is compact, and especially ideal for backpackers and campers who strive to maximize every square centimeter of baggage.
Not much more needs to be said about this invention, other than the fact that it does have to potential to be a do-it-yourself (DIY) project, rather than a commercial venture.
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Hydrogen Ion Toothbrush
Double Sided Toothbrush