Everything your heart desires, as long as it desires stationery.
A fun mix and match pen and highlighter system that lets you customize a pen with your favorite colors!
Pick a "center" double-ended pen in black, blue or red, then 2 highlighter colors to attach to each end of the center pen and voila! a custom pen with your favorite colors!
You can also just click the highlighters together!
"Center" pens have a bullet tip on one end and a fineliner on the other. Highlighters are chisel tip.