Listerine Smart Rinse Anticavity Fluoride Rinse, Mint 16oz Protect your child's mouth with LISTERINE SMART RINSE, MARVEL AVENGERS, MINT SHIELD. For kids six years and older, this alcohol-free mouthwash with fluoride is clinically shown to prevent and reduce tooth decay, and it offers 12- hour cavity protection. LISTERINE SMART RINSE strengthens teeth 99 percent better than brushing alone,* and cleans even in hard-to-reach places brushing may miss. It tints food particles and debris, leaving proof in the sink of a cleaner mouth. LISTERINE SMART RINSE is an alcohol-free fluoride mouthwash, and the sweet mint flavor and MARVEL AVENGERS theme make it fun for kids to take care of their teeth. *Based on laboratory testing. Data on file