I purchased these markers some time ago; they came in a textile bag, to keep them bunched together and somewhat organized, provided you removed only one pen at a time. To remedy that I came up with this model, it requires a bit more space than the bag, but it offers structure and flexibility in return.

Initially, I envisioned this as a quick print; however, the model's purpose, of holding multiple objects involves printing many individual shapes as separate paths, complete with retraction moves at the end of each. This process, inherently slow due to the model's complexity, results in nearly an hour per piece. Despite the prolonged printing time, it uses a minimal amount of filament and achieves considerable sturdiness.

Using the provided Fusion 360 file, you can adjust the size of the model to meet your custom requirements and also refine detailed parameters such as the offset or wall thickness, all within the 'Change Parameters' dialog (Solid → Modify → Change Parameters).

The print time of these varies greatly by the necessary amount of retraction moves, After several adjustments to achieve consistent outcomes, I went with these settings: one perimeter, no solid top layers, a bottom thickness of 1mm, seam position set to ‘Nearest’, the Classic Perimeter generator, and no infill. With this setup, my Prusa MINI+ manages to print one instance in approximately 50 minutes.
Ohuhu itself sells a Bamboo box organizer and I've seen similar models here on Printables (1, 2). A useful addition to my stands could be a box. IKEA sells an affordable one (UPPDATERA) that'll hold up to 128 markers using 4x4 grid organizers (eight of them). Four segments, side by side across the length of the box is a tight fit, a dab of hot-glue in the centre is enough to secure them. The two rows of organizers will leave a gap of roughly 10 mm, that makes it easier to grab markers from the bottom-most row.

The author marked this model as their own original creation.