Sailor Ink Studio’s 15th year milestone is filled with 50 ml of a water-based dye ink that is designed to be used with all fountain pens. This is a special commemorative edition bottle ink. The color: Ocean Blue is to promote nostalgic memories for users of a wonderful sea voyage. The internal reservoir of the bottle allows you to use all of the ink in the bottle without any waste. The high-quality ink is smooth-flowing and the unique bottle allows you to easily fill your fountain pen.