80 Slots Portable Marker Pen Storage Case Bag Holder Pouch for Copic Marker Sketch Pencils Fit Pens in Diameter 15mm to 22mm|Art Sets| - AliExpress
Polar Whale 2 Art Marker Storage Tray Organizers Pen Pencil Brush Storage Design Stand Supply Horizontal Storage Non-Scratch Non-Rattle Washable Compatible with Copic and More Each Holds 36 - Walmart.com
Copic Marker Storage System Holds 380 Sketch/ciao Markers - Etsy