Description A 30ml glass bottle of Monteverde Birthday Cake purple fountain pen ink. The ink is specially created with Monteverde's Ink Treatment Formula, which prevents the ink from drying out in your pen. This formula also improves both ink flow and drying time, as well as helping to lubricate and protect the ink feed system from corrosion and clogging. 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.