Noodler's Ink is 100% made in the USA from cap to glass to ink. Archival quality inks in large 3oz. bottles for vintage or new fountain pens. Polar Green is a completely bulletproof, eternal, forgery-resistant, water-resistant, and freeze-resistant ink in a fiery brown with bleach resistant halos. It is also a lubricated ink for denser paper grades and for use with piston mechanisms. Green with no hints of yellow.