Artificial Anti-Foam Finger for Carbonated Drinks
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3D-printed experimental gadget inspired by finger nucleation in soda.
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- Creative Commons — Attribution
This 3D-printed experimental gadget was inspired by the nucleation effect created when a finger touches carbonated drinks. Designed as a playful proof of concept, it explores how a simple everyday observation can be turned into a functional printed object that helps control foam and encourages earlier bubble This 3D-printed experimental gadget was inspired by the nucleation effect created when a finger touches carbonated drinks. It was designed as a playful proof of concept to explore how a simple everyday observation can be turned into a functional printed object that helps control foam and encourages earlier bubble release.
The design uses a clip-on support with a textured “finger” that extends into the glass, creating a controlled nucleation zone inside the drink. After a few iterations, the geometry was refined to better fit common cups, stay submerged, and improve stability during use.
Print information
The prototype was printed in PETG for better durability and drink-contact suitability. The first version was too large and the tip was too light, so the second version was adjusted with a more compact shape, a tighter clip, and variable infill to keep the finger submerged.
The bump map was created with the help of AI and then applied to the part using CNC Kitchen’s BumpMesh tool, with the goal of increasing the nucleation effect and improving foam control. The part was modeled and iterated based on real-world testing to reach a more functional result.
This model was prepared in PrusaSlicer, but the key print settings are listed below in case you want to recreate it in another slicer. These settings were used to keep the tip of the finger solid while reducing material usage in the upper section of the part.
Print settings
Top half of the finger: 15% gyroid infill.
Bottom half of the finger: 100% infill.
4 perimeters.
Overhang threshold: 10°.
Support type: Snug, since PETG can be difficult to remove from supports.
Infill/Perimeters overlap: 25%.