Application and audience
For slab-built pottery with a rounded body and a rim narrower than the widest part.
The system can be disassembled inside the clay instead of forcing a rigid form through a narrow rim. Small, Medium and Large are individually dimensioned sets; the ceramic handle is added separately after demolding.
Operation and assembly
- Insert the segments into the removable central pull-lock, alternating the four wide and four narrow parts.
- Form the slab-built clay following the Belly Mug documentation.
- Once the clay has firmed, remove the central core. Move the narrow segments inward, then remove the other parts through the opening.
Dimensions and variants
- Small: height / rim / widest body
- 60 / 53 / 69.1 mm
- Medium: height / rim / widest body
- 78 / 66 / 86 mm
- Large: height / rim / widest body
- 96 / 78 / 101.6 mm
- Measurement reference
- Internal forming geometry of wet clay
- Parts per mold
- 4 wide segments + 4 narrow segments + central pull-lock
Printing information
- Use the matched file set for your chosen size and its corresponding MakerWorld profile.
- Do not mix sizes or scale the files manually; the mechanism depends on its designed clearances.
Care and use
Published dimensions describe wet-clay forming, not the fired mug. Obtain shrinkage information from your clay manufacturer or measure it for your process.
Manuals and instructions
User manual — Belly Mug
English-language manual. · v1.2 · PDF
Open “Files & Guides” on the project page to access the PDF.
Project questions
Is the handle part of the mold?
The ceramic handle is added separately to the piece after demolding.
Are the three sizes just a scaled STL?
No. Each size has its own matched parts and interfaces.
Sources and documentation
Project documentation · reviewed .
Files and instructions on MakerWorld ↗


