Illustrating with alcohol markers: the battle between 5 brands.
Bullet Journal 60colours 0.4mm Fineliner Watercolor Dual Tip Brush Artist Marker Pens for Coloring - China Dual Tip Brush Marker and Dual Tip Brush Pen
Ohuhu Markers, 48-color Double Tipped Alcohol Markers, Chisel & Fine Alcohol-based Art Marker Set