Introducing the Colourpop BFF Liquid Liner, Colourpop's first ever precision felt tip liquid eyeliner pen. The easy to use, flexible tip glides on smoothly with intense pigmentation in one swipe without skipping or tugging. She’s with you from thin to thick, from a sleek wing to a full-on cat eye, she’ll build you up and won’t let you down. Find a friend that keeps you looking sharp all day, this transfer resistant formula won’t smudge, feather or run.