Description Esterbrook Tangerine fountain pen ink is a bright, rich shade of orange, and is specially formulated to combine a vibrant color with a smooth-flowing writing experience. The 50ml glass bottle is easy to hold while filling 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. Please note that items in the Outlet are a final sale.