This thing is based on Random maze generator, pure OpenSCAD. You may use this as a base for creating a random maze pen holder (may be found in Random maze container generator):

Or a random maze saucer (may be found in Random maze container generator):

Or a random maze ring (may be found in Random maze ring generator): You may change the following parameters to generate a maze cylinder, a different maze every time.

• wall_height
• wall_thickness
• cylinder_radius
• cylinder_height
• vertical_blocks
• horizontal_blocks

Give it a try: http://www.thingiverse.com/apps/customizer/run?thing_id=1229429