The Tongue to Teeth toothbrush is targetted towards busy people. By busy, I mean those who don't have three minutes to spare to go to the washroom and brush their teeth. Designed to be disposable, you just slip it on their tongue, and lick your teeth.
I'm not really sure how your tongue can reach the crevices between your teeth. But, I suppose if you compare this to not brushing your teeth at all, this would be a better option. I wonder about the comfort too. And, wouldn't the tongue to teeth toothbrush be a time-killer so one has time to shave?
You can tongue more here.
