Eagle and Alan pretty much said it all. However, Woodcraft, PSI, and HUT also carry some other pen boxes, including triangular shaped plastic boxes. I've seen everything from $0.30 to $0.50 plastic boxes to almost $10 wooden boxes, with a LOT of room in between. You might also consider the velvet/velour/suede pen sleeves, which are less bulky for the recipient, but don't give quite the same presentation effect if the pen is a present.