Description Colorverse USA Series Dakota Thunder fountain pen ink is a warm, darker shade of brown and comes in a fun-sized 15ml teardrop shaped glass bottle. This ink color is part of the Colorverse USA Special Series, with the colors inspired by things that each state is known for. Colorverse fountain pen inks are made in South Korea. 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.