Pentel Sliccies 3 Color Gel Ink Multi Pen Body Component - Sky Blue

Updating my previous review - the upper half of mine has become cracked right where the bottom screws in, so it won't hold tightly and instead comes unscrewed. The light plastic used for this isn't very durable, but you get what you pay for. I could have kept mine alive a while longer with tape and patience, but I'm trading up to the uniball style fit line instead - I prefer the flow and smooth feel of their gel inks. The feel of this pen is nice and light and it isn't clunky in a pencil bag, but it isn't too durable.
If you find yourself looking at the style fit line, the cartridges are compatible - you just have to use small pliers to pull out the plastic nibs at the top of the slicci cartridges and put them in the style fit ones, since the nibs on the slicci cartridges actually attach them to the pen body. The slicci cartridges work in style fit bodies once the plastic bit has been removed.

Fulfills its purpose very well. What surprised me is how light this thing is - fully loaded, it's a total featherweight. Even with three ink cartridges and all the mechanisms for them, it's about the weight of a disposable pen.