Handmade in Wake Forest, North Carolina, these easy-to-carry pens are machined from acrylic by one of the country’s foremost custom pen makers. They’re compatible with standard international cartridges, although the Pocket 40 also functions as an eyedropper pen. For extra protection, prime the inside of the barrel and grip section with silicone grease, then fill the entire barrel with ink. Both versions of the pen feature a translucent barrel that allows you to easily view the ink level, though the Ice and Blue-Violet version—with its machined, clear interior—offers a particularly captivating peek at the ink within the pen.