Stila Stay All Day Waterproof Liquid Eye Liner pens come in fifteen colors. That alone is a thrilling fact. Five of these shades are blue, if I'm not mistaken, which is absolutely delightful. There's a blue for everyone, and Indigo is my favorite. Stila's own description as a "royal blue" is spot-on. It's a color I've been looking for everywhere and there it's been all the time, at my local Ulta. A blue that is decidedly not navy, has an almost touch of teal but not quite, and possesses the richness and magic I seem to remember from several childhood books. And also a superb performance.
The pen definitely stays put all day and doesn't budge. It's more water-resistant than completely waterproof, but that can also be the result of the base one uses underneath (eye cream and primer in various combinations). what matters is that this Stila eyeliner does survive the day, looks beautiful, and is easy to remove with any eye cleanser I've tried so far, including makeup wipes.
Usage is as simple as it goes: give the pen a good shake (important for flow), and draw the line, as thin or as thick as needed. The tip on Stila's pen is slim, but it doesn't require much pressure to get a thicker line. The quality of the pen itself is obvious from the first use, and the even flow is among the best I know.
Bottom Line: an essential.
Stila Stay All Day Waterproof Liquid Eye Liner ($22, made in Japan) is available at Sephora, Ulta, and stilacosmetics.com.
(the pens pictured in the background are regular fountain pens, not makeup)