Whiter Image TOGO Teeth Whitening Pen - When this first arrived on the scene, it was my favorite product for several years. Then it went away for a couple of years (at least I couldn't find it!) and now it's back!
I like the portability of this little pen. You just paint it right on your teeth anywhere, anytime. (strips hurt my teeth and gums so I can't use them.) And, because it is more potent than strips, it does the job really quick. You simply apply it daily for a minute or two.