Jeremy Siers x Big Idea Design Fountain EDC

A titanium fountain pen built for pocket carry, this collaboration pairs a dark DLC-coated body with a gold PVD clip and matching grip section. The black tip completes the two-tone finish. The nib is a German-made Bock 180 in extra fine, delivering a crisp line suited to smaller handwriting or detailed notation. A Kaweco mini converter ships with each pen, and the design accepts standard international cartridges if you prefer swapping colors on the go.

The titanium construction keeps weight low while standing up to keys, tools, and the general chaos of a pocket or bag. DLC coating adds scratch resistance to the barrel, and the clip is stiff enough to stay put without tearing fabric. The extra-fine nib requires a bit more care than a ballpoint—you'll want to cap it between uses and avoid grinding it into coarse paper—but it rewards that attention with smooth, consistent ink flow and the ability to write legibly in tight margins or on smaller notebooks.

This pen works equally well clipped to a shirt pocket during the day or uncapped on a desk in the evening. The converter gives you access to bottled inks in any shade, and cartridges make travel simpler. The grip diameter is comfortable for extended writing sessions, and the cap posts securely on the back end to balance the pen in your hand. Limited production means once current stock sells through, this specific colorway won't return.