Get consistently brilliant color in every stroke with the customizable Olo Dual-Tip Markers. Designed as a modular system of two fully functioning, independent marker halves that are connected in the middle, they provide twice as much ink as traditional markers. Created with a patented free-flow system, these premium alcohol markers deliver consistent ink flow that utilizes more ink. Use for drawing, illustration, calligraphy, coloring, and more! - Olo Dual-Tip Marker - R5.7 Amaranth.