O.TWO.O Double-Ended Stamp Eyeliner – Waterproof Black Pen

Meet your new secret weapon for flawless eye looks — the O.TWO.O 2-in-1 Double-Ended Eyeliner Stamp Pen. Whether you're a beginner or a seasoned makeup lover, this innovative dual-tip tool makes creating sharp lines and perfectly symmetrical cat-eye wings effortless every single time. Made in China.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Why You'll Love It

• 2-in-1 Double-Ended Design: One end features a precision fine-tip liner for detailed line work; the other end has a pre-shaped wing stamp so you can press on a perfect flick in seconds — no freehand skills required.
• Long-Lasting & Waterproof Formula: Sweatproof, oil-resistant, and waterproof — this formula sets in just 3 seconds and stays put all day (and night) without smudging or fading.
• Perfect Wings Every Time: Simply align the stamp from the outer corner of your eye toward the end of your brow, press, and you have a symmetrical, natural cat-eye wing on each side.
• Elastic Sponge Nib: The soft, flexible sponge tip glides smoothly and won't split or fray, delivering consistently smooth, clean lines with zero streaking.
• Beginner-Friendly: Just two steps — stamp your wing, then connect with the liner tip. Line thickness is fully customisable based on your pressure and angle.
• 3-Year Shelf Life: Generous 36-month period after opening so it stays fresh and effective.

Product Details

Ingredients

Propylene Glycol, Glycerin, PVP, Acrylates Copolymer, CI 77266, Magnesium Aluminometasilicate, Caprylyl Glycol, Propylparaben.

How to Use — 3 Easy Steps

1. Press the stamp end lightly at the outer corner of your eye to create a wing shape.
2. Use the fine-liner tip to draw along your upper lash line and connect it to the stamped wing.
3. Go over the line again for added depth and a more dramatic finish.

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Expert Cosmetics Safety Resource

For guidance on cosmetic ingredient safety and regulations, visit the FDA Cosmetics Information Center.

Frequently Asked Questions

Q: Is the O.TWO.O stamp eyeliner pen suitable for beginners?

A: Absolutely! The pre-shaped wing stamp does the hard work for you — simply press it at the outer corner of your eye for an instant, symmetrical wing. The fine-liner tip then lets you connect and refine your look with ease, making it ideal for anyone new to liquid eyeliner.

Q: How long does the eyeliner last without smudging?

A: The quick-dry, waterproof formula sets in approximately 3 seconds and is designed for all-day wear. It is sweatproof and oil-resistant, so it stays in place through long days, humid conditions, and active occasions.

Q: Can I remove this eyeliner with regular makeup remover?

A: Yes. While the formula is highly waterproof and long-lasting, it can be removed with a dedicated eye makeup remover or a gentle oil-based cleanser. Avoid rubbing harshly — apply remover, let it sit briefly, then wipe away gently.

Q: What does the stamp end look like and how big is the wing it creates?

A: The stamp end is shaped to create a natural, curved cat-eye wing. The wing size can be adjusted slightly based on the angle and pressure you apply, giving you flexibility between a subtle flick and a bolder, more dramatic look.