CES 2014: Toothbrush 'tells you how well you brush'
6 January 2014 Last updated at 10:24 GMT
Kolibree's "connected" toothbrush promises to monitor how well someone brushes their teeth, transmitting data back to a smartphone or tablet app.
Its makers say it's a great way to make sure everyone in the family is properly taking care of their oral health.
The BBC's North America technology correspondent Richard Taylor, however, was less convinced.
Follow Richard Taylor on Twitter @RichTaylorBBC