3D Printable Funnels
18 real-world sizes from micro lab funnels to automotive fuel funnels. Parametric models with precise dimensions. Free STL download.
Open in Asset Store
Free Forever
STL / OBJ / glTF
18 Sizes
Watertight Mesh
FDM + Resin Ready
How to choose, print, and use these funnels
Free, parametric 3D printable funnel STL files in 18 real-world sizes. From 5ml essential-oil minis to 150mm wide-mouth canning funnels — every model is generated from exact mm dimensions with watertight mesh, optimized wall thickness, and a 0.4mm-nozzle-friendly taper. Download in STL, OBJ, or glTF format.
Step-by-step
- Browse the size table above to find a funnel that matches your container. Match the spout diameter to your bottle's neck opening — aim for 1-2mm smaller than the receiving opening so the funnel sits inside without spilling. Kitchen oil bottles typically need 14mm; engine oil filler necks need 20mm; lab vials need 5-8mm.
- Click "Open in Asset Store" to load the parametric model. The Asset Store viewer lets you orbit the 3D preview, switch palettes, and tweak dimensions live before exporting — useful when none of the 18 presets exactly match your container neck.
- Pick a material based on use case. PETG (food-contact friendly, hot-liquid tolerant) for kitchen and brewing; PLA (cheap, rigid, easy to print) for workshop and craft; TPU (flexible, impact-resistant) for automotive funnels that get dropped or stepped on; ABS or ASA for outdoor or chemical-resistant use.
- Slice with these settings: 0.2mm layer height, 3 perimeters (walls), 0% infill since funnels are hollow shells, no supports needed when printed spout-down. For single-wall funnels under 100mm top diameter, vase mode produces a perfectly seamless print in 30-60 minutes.
- Export STL, OBJ, or glTF directly from the Asset Store viewer. STL is the universal slicer format (Cura, PrusaSlicer, Bambu Studio); OBJ preserves UV coordinates if you plan to texture; glTF is the modern web format if you want to embed the model in a browser or game.
- Print spout-down with the wide opening on the build plate. This eliminates the need for supports inside the cone, gives the spout a flat smooth surface where it contacts the bottle, and lets the perimeters bridge the taper cleanly without sagging.
- Post-process if needed: a quick pass with 400-grit sandpaper smooths the spout interior so liquid flows without catching on layer lines. For food-safe applications, coat the interior with food-grade epoxy or use the funnel as a single-use disposable rather than washing repeatedly.
Frequently asked questions
What 3D printer settings work best for funnels?
Use 0.2mm layer height, 3 perimeters (walls), and 0% infill since funnels are essentially shells. Print spout-down for the cleanest taper and to avoid supports. Vase mode (single-perimeter, continuous extrusion) works for funnels with walls 1.0-1.5mm under 100mm top diameter and produces a watertight surface in a single 30-60 minute print.
Are 3D printed funnels food safe?
Standard FDM prints are not technically food safe due to layer-line bacterial harboring and potential nozzle metal leaching. For food contact: use food-safe PETG, print with a stainless-steel nozzle, and either coat the interior with food-grade epoxy or treat the funnel as single-use disposable. Resin prints made from food-safe resins (rare but available) are smoother and easier to sanitize than FDM prints.
What is a parametric funnel model?
A parametric model is generated mathematically from named dimensions (top diameter, spout diameter, total height, wall thickness, taper angle) rather than sculpted by hand in a 3D modeler. Change a parameter and the entire mesh regenerates with correct proportions, consistent wall thickness, and watertight geometry. Every funnel in this collection uses the same parametric generator, so a 50mm Kitchen Small and a 160mm Kitchen X-Large have identical print quality and mesh topology — just different scale.
What size funnel do I need for my container?
Match the spout diameter to your container's neck opening, aiming for 1-2mm smaller than the receiving opening. Standard kitchen oil bottles take a 14mm spout (Kitchen Medium). Engine oil filler necks need 20mm (Oil Funnel). Gas cans and diesel tanks need 25mm (Fuel Funnel). Lab test tubes and vials use 5-8mm (Micro or Lab Small). Mason jars use the wide-mouth 30-50mm. When in doubt, measure the container's inner neck diameter with calipers before picking a preset.
Can I customize a funnel's dimensions?
Yes — open the funnel in the ToolFluency Asset Store and adjust top diameter, spout diameter, height, and wall thickness with sliders. The mesh regenerates live as you drag. This is useful when none of the 18 presets exactly match your bottle, or when you need a thicker wall (2.5mm+) for chemical-resistant or hot-liquid applications. Export the customized version as STL once you're happy.
Do I need supports to print a funnel?
No — print spout-down and the funnel is entirely self-supporting. The cone geometry naturally bridges from the spout outward layer by layer, and the wide top is flat against the build plate. Supports actually hurt funnel prints because they leave marks on the interior taper that catch liquid. The only exception is if you're printing top-down for some reason (don't), in which case you'd need full tree supports inside the cone.
Free for personal and commercial use. ToolFluency provides parametric STL files as-is — verify food safety, chemical compatibility, and load-bearing requirements for your specific application before relying on a printed funnel for critical use.