Tombow AirPress pen
The Tombow AirPress pen uses an ingenious mechanism to pressurise the ink with every click, enabling this pen to write under otherwise very difficult circumstances. It can write upside down, on wet paper, dusty surfaces, even in space! The special ink also allows it to write in very cold conditions.
red, light blue, green, yellow, black, all black, clear, blue, and orange
all black, black, blue, clear, green, light blue, orange, red, yellow