Re: I'd totally use something like this
Seeing how much brands like Braun charge for their toothbrush heads I wouldn't hold my breath (ah !). A bit like printer vendors and platine-priced ink.
I can imagine that because some of the stuff will be swallowed/lost, we'll have to "refill" our STARS thingy from time to time ?
the IONP continually reattach themselves and also get gathered by the magnetic field and reintegrated into STARS mass.
Why do I have this eerie feeling ?
"But it will fit inside the mouth."
That's a good start, at least someone is setting priorities right here.