My GF wanted a pencil / pen / accessory holder for her desk. She couldn't find anything she wanted, so had me design this for her. It's about the largest our Ender 3 V2 could handle and took 44 hours to print. Walls and base are 2mm thick, printed with PLA. No supports, etc. Infill is 20%, but you could just add another wall.

It's also a good test of your bed level!