Uni-ball Signo Pen Set
Uni-ball's Signo Pen Set ($25/set of 8) has the world's thinnest ball point tip — a diameter of 0.18 mm, or about the width of two human hairs. While currently only available in Japan, the Signo can be purchased online like most lustful objects. This set comes with 8 colors — orange, light blue, violet, pink, red, black, emerald, and blue. [via Wired]