Description In honor of the 150th anniversary of Diamine, eight new ink colors have been released. The 1864 "Anniversary Collection" features new, triangular-shaped 40ml bottles, and when these are all placed together, they form a round display. Tropical Green is a bright, vibrant shade of green. 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.