This one is called Liner Express and it's a liquid liner but it has a pen tip.
This one is "Liner Definer" and it's a pen too, but the marker type:
I had completely different results with these. The Liner Definer was so horrible I actually threw it out. Not only did it scrape my eye but it wasn't even black. It was such a diluted colour it really was like putting a magic marker on my eye. I haven't seen this product on the Maybelline site so I am hoping they discontinued it.
Left is Liner Express, Right is Liner Definer:
I actually liked the Liner Express, it was a bit liquidy when I first got it but it's perfectly fine now. It is a really good black that shows well even over dark eyeshadows. It is also easy to get a good line, and one really close to the lash line. I use this quite a bit now because I don't have to use and was a brush. Some of my eyeliner brushes are getting pretty worn out from washing and I even had to throw one out a few days back. This liner didn't smudge or flake, and although it didn't last as long as some gel liners I've used I still got a good 8-9 hours out of it.