Double Sided Toothbrush
This was bought in Japan in 1986, although it was actually made in Canada! And we subsequently saw it in a local chemist here in the UK - they stocked it for about a year.
Because there are two, opposing sets of bristles, you can brush the front and the back of your teeth at the same time.
The idea of course is really to save time in the morning, when you are in a hurry.
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