We saw those a while back but I never though of putting one in a kit. Post it makes some mini post it notes in a little black binder that holds some of those stick flags too, you can pull the post its out and carry them too.
Wife signed up on some sort of product sample list a few years ago, we get all kinds of mini products, I used those for kits and traveling, then when I buy the full size product I refill the mini bottels and keep them in the kits.