Sherlock Hones Invisible Ink Pens Party Pack Comes in 3 INK COLORS! Awesome Secret Message Writing! A Set of Disappearing Ink Pens with UV Black Lights on Keychains - Magic Secret Agent Spy Pens Create Amazing Results with these Colorful Disappearing Inks on T-Shirts, Jeans, Tops and Richly Colored Papers! Bring the Magic of Disappearing Inks to Life with 3 INK COLORS! Hot Pink, Electric Blue, and Yellow Green Dream! Great Kid Fun For Secret Agent Parties! - Secret Message Writing - Identify Valuables with Your secret Mark - Discreetly Mark Wedding RSVP's. Invisible Pen Inks are; Non-Toxic, Environmentally Friendly, High Quality, Long Lasting, and Waterproof. Make an Ordinary Day, Extraordinary! 100% Guarantee, by Sherlock Hones. We've Got Your Back!