Other Information: Store at controlled room temperature 68-77 degrees F (20-25 degrees C). Cold weather may cloud this product. Its antiseptic properties are not affected. Misc: With Everfresh technology. Controls tartar build-up. Kills plaque & gingivitis. Germs, keeps breath fresh for hours. Powerful dentist clean feeling up to 3x longer (vs brushing alone). No. 1 dentist recommended brand (among OTC mouth rinses). Clinically proven. Kills germs by millions on contact. Listerine Ultraclean with Everfresh technology has the benefits of Original Listerine Antiseptic with an added tartar control ingredient. Plus, it provides a dentist clean, fresh feeling that lasts for hours. This formula is not sold to any retailer as a store brand. www.listerine.com.