The covergirl flipstick uses the S.I.T. method of innovation by multiplying the lipstick itself so that there are two lipsticks attached to one another.

This added lipstick is a different color/finish and has has the benefit of allowing users to mix and match to create different finishes/colors.

You can find it here: http://www.musingsofamuse.com/2011/12/covergirl-blast-flipstick-review-swatches-photos.html