Johnson & Johnson Healthcare Products has reformulated Listerine Agent Cool Blue, its pre-brush mouthrinse that helps children brush better for a cleaner, brighter smile. The unique, alcohol-free formulation temporarily tints kids teeth blue so they pay more attention to cleaning their teeth. Half of kids between the ages of five and nine will have a cavity or filling, according to the U.S. Department of Health and Human Services, and a recent StrategyOne and Harris Interactive survey of p...