A box for holding Expo Markers (thin, pen/pencil style) 86601. This attaches to a whiteboard with either suction cups, or a magnetic badge holder.
Adams Manufacturing 7500-77-3040 1/8" Suction Cup
Use the suction cup without the hook, and press into the holes at the top. For best success, clean surfaces before attaching. Use the pull tab to detach and realign as necessary.
Other badge magnets may work as long as they have 2mm of the magnet exposed. The metal plate with adhesive backing should be kept for other purposes.
Press the magnetic part of the badge holder into the box, with the caution symbols facing outward. Attach to a magnetic whiteboard/other magnetic surface.