Yves Saint Laurent

Yes, it's kind of ridiculously priced for a very slim tube of eyeliner, but it's called the Easy Liner for a reason. This is the liquid eyeliner for an impeccable cat eye and I've never come across another brush tip that's like it. It's a calligraphic brush, so it's basically like using a tapered paintbrush, and it goes on so easy. It also has a surprisingly good flow for an automatic pen, meaning it doesn't skip or go on thick one area and sheer another. [$34, Nordstrom]