Description 3 Oysters Delicious Mustard fountain pen ink is a deep, rich shade of yellowed brown, and comes as a 3ml sample in a plastic vial with a dip at the bottom to allow you to easily get every drop, labeled with the name of the ink brand and color. 3 Oysters fountain pen ink is made in South Korea, and the Delicious line of ink colors is inspired by Korean fashion and food. 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 $50 for US customers, and for orders over $250 for our Canadian customers.