This large fountain pen made of clear acrylic speckled with colorful acrylic flakes is an eyedropper filler with a shut-off valve mechanism to prevent unwanted leaks. Due to the material and manufacturing process, each pen has a unique look and no two pens are identical.
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)