The liner comes in a sleek black tube. I found it very easy to work with. I like the handle, it is nice to hold and long, so you have control of what you are doing. The tip is very precise (click on the picture to see it in a full size - I left it big). I took a picture of the pen with the Illamasqua polish in Spartan so you can have an idea of how big it is. It contents 1.8ml of product.
Now about the color. It is a very pigmented yellowish gold. It shines like crazy. I swatched it with the Illamasqua Liquid Metal in the shade Solstice so you can see the difference. Now the best part is how long it lasts. What Illamasqua says about the product is absolutely true. I put it on my hand waited a few moments and then tried to rub it off, no matter how hard I tried it styed! Wow! I tried it after a few hours and it was the same. Makes you think...will it go off? :) oh yes, with an oil based remover, no problem.
And here is a quick look I made with it. I love the combination of purple and gold. I did a sleeping eye so you can see the pen :) I have oily lids but that was no problem, it stayed on.