Listerine Advanced White Mouthwash - 1000ml

I have just started using this product, it is a very good mouthwash but my teeth are not yet any whiter, I am hoping this will change with time

I have used this product twice a day for a week and feel that it definitely helps to keep my bleached teeth whiter. Not sure how this would worked on unbleached teeth but does the whitening job for me wonderfully!