This pen advertises that it's a 12 hour wear liquid eyeliner and that the pen has continuous flow "for smooth and even lines." Maybelline also points out that their pen has an "exclusive ultra thin 0.4mm brush tip." The packaging is made of plastic and very light weight with white lettering printed on it. It's definitely not the most fancy packaging out there but there's something sleek and modern about it.
I've been able to use this a couple of times for roughly a week since buying this pen and that's basically as much as I'm ever going to use this pen. Although the formula for this pen is not waterproof and washes off very easily with water and soap, it actually does wear for a nice long while. I was really surprised that I went through a whole day and my eyeliner still looked good. Plus, the ink is nice and black, though there was a slight sheen to it after the liner dried.
Those light lines in the middle in the photo above are drawn with the tip. It didn't use to come out that way. It actually used to be nice and dark like that thicker line at the very top. After swatching the thinner lines, the tip of the brush was too dry to swatch with the tip any longer although there was plenty of ink farther up the brush. It's a bit of a waste actually since there's still so much ink left to use, it's just nowhere near the tip of the pen. I store this pen upside down as well if you're wondering and that no longer helps. It's like the ink won't travel all the way to the tip.
So, yea. Now I have a liquid liner pen that I can't really use although the formula is actually pretty nice. It's really too bad that the design is flawed on this product. I think it's time for me to really consider the Dolly Wink liquid liner pen since I've been hearing great things about that. Although, I talked to the saleswoman at Sune and she said that the Dolly Wink pen has not been FDA approved yet, only the pencils. How I'm going to get my hands on this product will be something for me to think on it seems.