A random assortment of ATC's featuring "Zentangles" (learn more about zentangling here) :
Zentangle Pattern Organza: 6 variations
My favorite pens for tangling. They come in a set so they're easy to through in your bag and take with you. Plus the plastic sleeve keeps them organized. I also find having them all together reminds you to switch sizes when working on a piece. And this is a great price compared to my local Aaron Bros....