Colorverse Ink Season 3 – Multiverse features 6 two-bottle sets. Each set comes with a 65ml and 15ml bottle of fountain pen ink containing 2 complimentary colors. Multiverse includes No. 21/22 Schrodinger & Cat (65ml+15ml), No. 23/24 Photon & Gluon (65ml+15ml), No. 25/26 String & Brane (65ml+15ml), No. 27/28 Extra Dimension & Warped Passages, No. 29/30 Matter & Anti-Matter (65ml+15ml), and No. 31/32 Electron & Selectron (65ml+15ml). Explore the Universe in color with these unique fountain pen inks.