Buy the Stila — with one condition attached. Buy it if drugstore pen liners have already failed you: if they flake off a hooded lid by lunch, disappear into a monolid crease, or smear the second your eyes water in the wind. Stila Stay All Day Waterproof Liquid Eye Liner in Intense Black is a marker-style pen with a flexible fine tip, and its entire argument is wear. It stays. If cheap liner already behaves on your eyes, NYX Epic Ink does the same job by the same method for a fraction of the money and you won’t miss much. And if what you want is a line you can thicken, soften, or smudge out, no pen can do that at all — you want a gel pot and a brush.
The verdict, up front
Oily or hooded lids, watery eyes, long days — anyone whose liner has a habit of migrating by mid-afternoon
You’re learning to line, or you go through pens fast and would rather replace one often than baby it
You want to control the thickness, tightline the lash roots, or smoke the line out — things a pen physically can’t do
What Stila Stay All Day actually is
It’s a pen. That sounds reductive, but it’s the point: the ink lives in a barrel, the tip is a slim flexible nib rather than a separate brush you dip, and you draw with it the way you’d draw with a fineliner on paper. No pot, no wand, no jar of gel drying out on your counter. Stila’s has been on shelves since before pen liners were the default, and it set a lot of what the category now takes for granted.
The formula is the reason it costs what it costs. It sets in a few seconds and then it’s done: it doesn’t transfer to the crease, it doesn’t lift when your eyes water, and it survives a humid day without printing a mirror image on your upper lid. That last failure is what sends people shopping in the first place, and this solves it more reliably than anything at the drugstore.
The tip is flexible, not stiff. Press lightly for a hairline; lean in and the nib splays into a much thicker stroke. That range is useful once you have the feel for it and treacherous before you do, because the pressure that gives a crisp tail is also the pressure that blobs. Stila sells a firmer Micro Tip version, a dual-ended one, and shimmer shades; Intense Black in the original tip is still the workhorse.
Does it actually work?
Yes — on the thing it claims, which is staying put. One of the few products in the aisle where the promise and the result line up.
The asterisk is the tube. It’s tiny, and it often goes patchy with ink still visible in the barrel — the nib dries out faster than the reservoir empties. Nine or ten months from one is doing well. Priced per milliliter it’s among the most expensive liners on the shelf, and rarely finishing it makes that worse.
The formula is worth it; the packaging isn’t quite. If your lids defeat cheap liner, pay for the formula and accept that you’re renting it. If cheap liner already stays put on you, you’re paying a premium to solve a problem you don’t have.
Pros and cons
Pros
- Waterproof in the real sense — survives tears, sweat and humidity without transferring
- Dense, even black in a single pass — no going back over a patchy line
- Flexible tip does both a hairline and a thick stroke depending on pressure
- Satin finish reads like ink rather than like a marker line
- Comes off cleanly with an oil-based remover
Cons
- A very small tube for the price, and expensive per milliliter
- Often goes skippy while ink is still visible in the barrel
- That same flexibility blobs under a heavy hand — not a beginner’s pen
- Sets too fast to smudge or soften — no smoky option
- Won’t budge for micellar water, and can’t go on the waterline
Who it’s for
Buy it if
If your lids run oily, this is the pen worth the money. Oil is what dissolves ordinary liner into a smudged shadow above your lash line by 3pm, and this formula sits on top of it. Prime the lid anyway — our eye primer guide covers what earns a spot in the routine.
If your eyes are hooded, the flat lid space is small and anything that can transfer will. Keep the line thin along the lash roots and put the weight at the outer third, where the hood won’t swallow it.
If you have a monolid, a pen gives you the control to build the line thicker than you’d think you need, because a thin line disappears on a lid with no crease to sit under. Monolid eye makeup works on different rules, and liner is where that shows up first.
If you cry at things — weddings, commercials, planes — this is the category to shop in. Waterproof pen liner is the one thing that survives it.
If you wear liner three times a year, don’t buy this. It’ll dry out in the drawer long before you finish it, and you’ll have paid a premium for ink you never used.
Skip it if
Skip this one if you’re a beginner still figuring out where the line goes. The tip punishes an unsteady hand, the ink is unforgiving once set, and you’ll learn faster on a cheaper pen you’re not afraid to waste. Skip it too if what you want is a soft, smudged, lived-in line — this formula dries too fast to blend, and that’s a design choice, not a flaw.
How to use it
The mistakes people make with this pen are all the same mistake: treating it like a marker instead of like ink.
Draw in short dashes, not one long sweep. Three or four connected strokes along the lash roots, then join them. One continuous stroke is how you end up with a line that’s thick at the start and starved by the end.
Don’t stretch your eyelid. Pulling the skin taut gives you a straight line on stretched skin that turns wobbly the instant you let go. Look down into a mirror held below your face instead — the lid drops flat on its own.
Hold still for a full ten seconds after. The ink sets fast but not instantly, and looking down or blinking too early stamps a faint copy of your line onto the skin above it.
For a wing, map it before you ink it. Line up the angle first, mark the tail’s endpoint, then draw back toward the lash line and fill. Our winged eyeliner guide walks the whole shape, and the same logic in the rest of the eye makeup guide applies here.
The dupe: NYX Epic Ink Liner
NYX Professional Makeup Epic Ink Liner is a dupe in the strict sense, not the loose one: same format, same mechanism, same idea. A sealed pen barrel, a slim flexible felt tip, a waterproof ink that sets in seconds. It isn’t a different kind of product doing an impression of the Stila. It’s the same kind of product, made cheaper.
The tip runs slightly finer, which suits a hairline more than a bold band, and the black is very nearly as dense on the first pass. What you give up is margin on the hardest lids: on oily or heavily hooded eyes it’s the one more likely to print a faint shadow by evening, and the nib softens sooner with daily use. Neither is a dealbreaker unless you’re the person the Stila was built for.
There’s also an argument that has nothing to do with performance. Both pens die of a dried-out nib rather than of running empty, so the cheaper one is the smarter thing to run through — three of them still cost less than one Stila, and the third writes like new.
The splurge: Bobbi Brown Long-Wear Gel Eyeliner
Bobbi Brown Long-Wear Gel Eyeliner in Black Ink isn’t a better pen. It’s not a pen at all, and that’s the whole reason to want it. A pot of waterproof gel and a brush of your choosing does three things the Stila structurally cannot.
You choose the line: a pen has one nib and one vocabulary, while a gel pot takes an ultra-fine brush for a lash-line whisper on Monday and a flat angled brush for a graphic band on Saturday. You get a working window — twenty seconds or so before it sets — in which the line can be smudged or diffused into a smoked edge, the one look a fast-drying pen locks you out of. And you can press it into the lash roots to tightline, filling the gaps between hairs so the lashes look denser with no visible line at all. None of that extends to the waterline, which needs a kohl or gel pencil rated for it — see the waterline makeup guide.
The cost isn’t only the pot: it needs a brush bought separately — an ultra fine eyeliner brush or similar — plus practice and about ninety more seconds every morning. In exchange the pot lasts years rather than months and never goes skippy. Buy it for range, not for speed.
FAQ
Is Stila Stay All Day really waterproof?
Yes, in the ways that matter day to day: it holds through tears, sweat, humidity and rain, and doesn’t transfer onto the upper lid once set. Long submersion is another matter — laps in a pool break down any liner eventually. It also means micellar water won’t shift it; use an oil cleanser or a bi-phase remover.
Why does my liner go patchy when there’s still ink in it?
The nib has dried out ahead of the reservoir. Cap it firmly every single time, store the pen lying flat, and if it starts skipping, hold the tip pressed against the back of your hand for a few seconds to draw ink back down. That buys weeks, not months. When it stops working, it’s finished, however full it looks.
Can I use it on my waterline?
No. Pen liners aren’t formulated for the inner rim, they won’t adhere to a wet surface, and putting a felt tip near the tear duct is a good way to irritate your eye. Use a gel or kohl pencil made for the waterline instead.
Micro Tip or the original brush tip?
Micro Tip if you want a precise hairline and a defined wing with less pressure control required — it’s firmer and finer. The original flexible tip if you want one pen that can do both thin and thick depending on how hard you lean. Hooded lids usually do better with the Micro Tip, because the line needs to be thin to survive the fold.
How do I get it off without pulling at my lashes?
Press a cotton pad soaked in bi-phase remover against the closed lid and hold it for fifteen seconds before you wipe. The solvent needs contact time to break the film. Rubbing at waterproof liner is what costs you lashes, not the liner itself.
How we picked
A dupe has to work the same way, not just make the same claim, so the only candidates were sealed-barrel pens with a flexible felt tip and a waterproof ink — Epic Ink matched on all three, and we named where it gives ground: oily hooded lids and nib life. The splurge had to earn its place by doing something the pen can’t, not by being a fancier pen, which ruled out every premium liner in the same format. Everything here is a true black and buyable on Amazon.
Bottom line
Buy the Stila if your lids are oily, hooded, or watery and ordinary liner has already let you down — the formula does what it says, and no drugstore pen matches it on the hardest days. Dupe it with NYX Epic Ink if liner behaves on you anyway, if you’re still learning, or if you’d rather replace a cheap pen often than nurse an expensive one. Splurge on the Bobbi Brown gel only if you want a line you can shape, smudge and tightline, and you accept the brush and the extra minutes that come with it.
It loses a point for a tube that quits before it’s empty. That’s the trade for the best-behaved ink in the aisle, and for a lot of people it’s a fair one. More verdicts like this sit in our Buy, Dupe, or Splurge archive, and the rest of our liner and shadow coverage lives in Makeup.
