Parametric Foldable Under-Desk Cup Holder

Fully 3D Printed Foldable Mug/Cup Holder

A foldable mug/cup holder designed to mount under a desk, table, shelf, or workbench.

The model is fully 3D printed and parametric, so you can customize it for different mug or cup diameters before printing.

✨ Features

• Foldable under-desk design
• Fully 3D printed
• Parametric/customizable cup diameter
• Print-in-place moving section
• Can be mounted with screws or double-sided tape
• Good for desks, offices, gaming setups, workshops, and small spaces

📐 Customization

A detailed customization guide is included in the attached document.

The document covers:

• Parameter definition — page 2
• Preparing the model in Bambu Studio — page 5
• Assembly steps — page 7

⚙️ Main parameters:

1. Mug diameter
   Measure your mug/cup and add around 5 mm extra clearance.
2. Tolerance Join
   Used for the hinge tolerance. Recommended value: 0.25 mm.
3. Tolerance
   Distance between separate moving objects. Recommended value: 0.2 mm.
4. Screw diameter
   Diameter of the screws used for mounting.
5. Thickness
   Thickness of the print-in-place model.
   Recommended value: 6 mm (max 10 mm).

After customizing, export the model as a 3MF and open it in Bambu Studio.

🧩 Important Bambu Studio Preparation

After opening the customized 3MF:

1. Right-click the model and select Split to objects.
2. Move the main body frame and the hex-pattern coaster.
3. The two side pins are optional; they can be moved or left in place.

Do not move or auto-arrange the plate that contains the print-in-place objects.
This can break the alignment needed for the moving mechanism.

Strength recommendation:

Walls: 4

Infill: 20%

Assembly

The holder can be mounted using screws or strong double-sided tape.

1. Install the main body frame by aligning its face with the desk/table edge.
2. Slide the print-in-place holder section all the way back.
3. Insert the pins from both sides until they are flush with the frame.

For detailed instructions, check the attached document.

📏 Test tolerance model.

Before printing the mug holder, you can test the hinge and slider tolerances using the print-in-place tolerance test model here.

This helps you check which gap moves freely on your printer and avoid printing the full holder with tolerances that are too tight.

V2 Update 18/05/2026

1. Increased strength of the cup holder arms (first screenshot below).
2. Added hinge anti-slip clips (second screenshot below).

3. Updated thickness parameters. It can go up to 10mm thick.