Stop searching for the right funnel size. Whether you need a tiny spout for pouring 3D resin back into a bottle, or a massive wide funnel for car oil, this generator creates the exact fit in seconds. Unlike other models online, these funnels are completely smooth inside without annoying designer names embossed on them that trap dirt and fluids. The handle is deeply embedded into the wall and features a fully enclosed, perfectly centered hanging hole for maximum strength.

🧠 Behind the Design (For Makers & Moderators) 

This is not a simple primitive shape extrusion. This fully parametric OpenSCAD tool utilizes complex dynamic 2D-to-3D hull() transformations to calculate a structurally reinforced handle profile. The algorithm uses mathematical constraints (e.g., min() functions based on cone height) to deeply anchor the handle geometry directly into the conical wall parameters, ensuring it generates as a unified, high-strength manifold solid. Furthermore, it employs precise boolean overlap logic (difference() with calculated micro-offsets) across intersecting conical and cylindrical forms to guarantee clean internal geometry and hydrostatic impermeability (watertightness) across any user-defined scale.

🛠️ What can you customize?

• Dimensions: Control the top diameter, spout diameter, cone height, and spout length precisely to the millimeter.
• Wall thickness: Make it thin to save filament, or thick (2mm+) for heavy-duty automotive use.
• Handle: Toggle a convenient side grip on or off, adjust the length, and even add a hanging hole. The hole is now perfectly calculated to sit in a reinforced drop-down tab, so it will never snap off your pegboard.
• Quality: Adjust the resolution slider to make the curves perfectly smooth, or lower it for a fast-rendering low-poly look.

🖨️ Print settings

This is a quick and robust print.

• Material: PETG or ABS/ASA is highly recommended for chemical resistance (oil, resin, cleaning fluids). PLA works fine for dry kitchen goods like sugar or spices.
• Walls: Minimum 3 walls. This is crucial to make the funnel watertight and prevent fluids from leaking through the layer lines.
• Infill: 15% is enough.
• Support: 100% support-free.

❤️ Share your setup
What fluid are you pouring? Please share a photo in the reviews! It helps others see the potential of this simple yet effective design.

Happy printing!