Chameleon Fineliners are really fun. They have a dual ink system, with ink in the pen and in the cap. They are really easy to use to blend the colours you just have to switch the caps for a few seconds. It takes a little bit of getting used to how long you swap them for for how much colour, but it really only takes seconds.

As well as changing colour the pens are fineliners with fine point Japanese precision 0.3mm metal-clad tips.  So they are neat and good to write with.

You can find the complete collection at Chameleon Art Products.