New Listerine with Whitening is an awesome way to whiten your teeth without adding anything in to your regimen. You take something you usually do (mouthwash) and you add a whitening component in to it. It is so easy and you don’t have to mess with trays or strips or anything like that. I especially liked that you notice a difference right away. Within a week I saw a noticeable difference. I currently have invisalign and it really helps to keep my teeth and my trays clean. I received this item for free in exchange for an honest review but I will honestly keep on buying it from now on!