SHIKIORI - Four Seasons Weave - Fountain Pen Bottle Ink as a Cartridge. Comes in a dedicated plastic case for easy carrying.
The body is laser engraved with the color name of the ink so it is easy to carry multiple colors at the same time, and you can share it with your friends.
The book-reminiscent packaging expresses the world of the four-season weave, with each color, and is perfect for the "unpackable display (storage)" that shows the spread of recent years.