This was gifted to me by a good friend and a colleague recently – I guess she knows me very well as this is exactly what I had been looking for in addition to being a penguin! A huge thank you for this one.
This is a penguin-themed Legami Milano gel pen. And it isn't labelled 'Always Cool' for just the theme, but the gel ink is heat sensitive – making it erasable for a short while before it settles. And no, it doesn't smudge either. And the 'Always' in the name is because you can get refills.
In a very short while it has become the second-most used drawing utensil when it comes to my dev work. Here it is pictured with the most used one, Wacom Pro 2.