The Opus 88 Demo 2022 fountain pen of the year is demonstrator pen that is eyedropper filled.
This large fountain pen features transparent purple acrylic with red ebonite accents. The design utilizes an eyedropper filler with a shut-off valve mechanism.
To fill, unscrew the section, fill with the included eyedropper, and replace section. To write, simply unscrew the end blind cap, which releases the middle piston rod's shut-off mechanism. (video below)