Noodler's Ink Fountain Pen Bottled Ink w/ Eyedropper & Free Pen, 4.5 oz. - Blue Ghost Noodler's Ink is 100% made in the USA from cap to glass to ink. Archival quality ink in large 4 5oz eye dropper bottle for vintage or new fountain pens. Blue Ghost is invisible by day and glows under UV light! Great for secret messages! This ink is also bulletproof, eternal, forgery-resistant and water-resistant