I had heard of Listerine Whitening Rinse but never tried it.  We always use Listerine , I grew up using it and always have.  A few months back I had to buy some more Listerine and it came with a free sample of the whitening rinse.  At first I thought it was just a gimmick, you know like though strips and all, but then I thought well it is made by a company that has been around a long time, so I gave it a whirl, wow, what a differance a day or two makes.  I noticed right away the differance.  I even enjoy the taste.  It doesn't burn like you might think it would and the taste is actually quite...