Marker Storage - A versatile storage solution for all markers including specialized coloring systems like Spectrum Noir. This is a Modular system which can be customized to your personal space --Three different ways to build - horizontally, vertically or angled. Will accommodate most markers and marker systems. Portable and lightweight. Stylish design. Due to the nature of alcohol markers, they need to be stored horizontally to ensure even ink flow to both ends. With this in mind, Crafter s Companion developed a versatile storage solution that fits not only Spectrum Noir markers, but also all pens up to 17mm (5/8) in diameter, including specialized coloring systems.