People often chew the ends of their writing instruments.
Today’s invention is a disposable cylindrical sleeve which fits on the end of a pen or pencil.
Bristles, like those on a toothbrush, extend radially outwards from the sleeve so that chewers can clean their teeth and massage their gums -rather than grinding plastic or wood splinters into their mouths.
After use, the sleeve can be discarded and replaced. Sleeves might be flavoured and/or pretreated with mouthwash.