"I used felt-tip liner every morning for a decade, then one day I woke up and decided to quit cold turkey. It was so hard to keep the look from creasing, and the pens kept drying out. But this Mary Kay Liquid Eyeliner Pen ($16) has me back on the felt-tip-liner train. It is inky but dries fast and doesn't crease, and my pen is still going strong a month later." — DD