Pocket Pen with Easy Refills

I designed this pen as a cost-effective alternative to pricey compact pens and troublesome 3D-printed models. When closed, it’s pocket-friendly; when opened, it’s full-sized. Unlike expensive pens with overpriced refills, or 3D models that make you to cut cartridges and possibly make a mess, this pen is made to perfectly fit a Pilot G2 Mini ink cartridge—no cutting, no hassle, just drop it in.  I usually print them out of ABS to make them more heat resistant.