Flash Photo Gloss

Got as a sample from Sephora Play. It's a gloss with a slight blue tint to it--the idea being that you can throw it on over whatever you're already wearing on your lips (or use it by itself), and...

The Flash Photo Gloss is advertised as a gloss with a subtle blue that is not visible on the lips yet grants the effect of making your teeth look whiter, particularly in flash photography. Sounds...