This brush is awesome to use with every lip product, especially the lip stick and the lip plumper. You know how you can’t roll up the tube anymore, but you see that there is still more left in the barrel of them both? Well, you keep this Jane Iredale retractable brush with you in your purse and then you can use it to get the color from the stick and put it on your lips. Otherwise, you end up tossing out about 1/5 of the tube bc it doesn’t roll up. You can also just use the “sable lip” brush, if you don’t want the retractable one. Come by kai and check this out!