Originating from Hawaii, the Koa wood used in this pen will give you a little taste of its homeland. While you fill out papers and forms, a quick glance at your pen can make you think of the Hawaiian beaches, burying your feet in its sand. A Manhattan pen is simplistic, yet in a stunningly beautiful way. it is an everyday kind of pen. Refill instructions: Twist top clockwise until it comes off. Then you have access to the ink cartage.