Description Sailor Shikiori Potsupotsu fountain pen ink is a darker shade of purple. The cardboard box contains 3 Sailor fountain pen ink cartridges inside a plastic carrying case, and the name of the ink color is embossed on each cartridge! Sailor cartridges are proprietary and only fit Sailor fountain pens that accept cartridges. This color was designed as a companion ink to the 2021 Sailor Sound of Rain Winter Rain lavender colored fountain pen. The Sounds of Rain inks are inspired by the different sounds that rain makes as it falls. Potsupotsu represents the cold ‘pitter-patter’ of a brisk winter rain in the icy lilac color. Sailor fountain pen ink is made in Japan, and is very well behaved, has good flow, and is easy to rinse out of your fountain pen. Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side. We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers.