Zebra Clickart Knock Sign Pen DK (Pack of 12)

Zebra Clickart Knock is an ingenious felt-tip pen with a retractable felt tip. The ink is specially formulated to resist drying for an entire year – as long as you keep it retracted when not in use. The ink remains moist by absorbing moisture from the air. Therefore, it is best if the pen is stored in a room that is not too dry.

This 12-pack contains the colors: blue-black, blue-gray, blue-green, dark brown, green-black, light brown, magenta, red-black, red-orange, smokey blue, turquoise, and emerald. 

Can also be bought individually.

The pen won the Good Design Award 2019.