Blizzident is a 3D-printed toothbrush that conforms to your mouth via a custom tooth mold taken at the dentist. In order to scrub every tooth in one go, this "toothbrush" resembles a mouthguard with bristles sticking out of the top of it, which is where all your teeth go to get clean. The bristles are positioned at a 45 degree angle across your teeth and gum line, along with ones that get in-between teeth for a thorough scrub (though it sounds a bit painful to me).
By simply biting and releasing for 10-15 times, Blizzident promises elimination of all "user errors," "optimum plaque removal" and "optimum protection of gums and tooth surfaces." Plus, only the "to-be-cleaned" places in your mouth will be cleaned, along with your tongue, which should banish bad breath. Also, "it is real fun." Yes, that was an actual bullet point on their webpage.