Optimized Yarn Bowl

I wanted to print a simple yarn bowl for a family member who loves knitting and crocheting, but found existing designs were based on carved wooden designs not optimized for the 3D printing process.

As a result I created this design which uses overlapping bowl walls to hold the yarn in place instead of the spirals which are common in other designs.

This design is easier to make because:
- No support material is required (no overhang exceeds ~50 degrees to the vertical).
- It is a single part with the base integrated rather than a separate part as with some other designs.
- Reduced post-processing is required, primarily due to absence of support material.
- Recesses for weights to be added are included in the bottom. These are 20mm in diameter and will fit washers, nuts and low value coins which can be easily glued in place.

For those looking to remix this, want to add a cutout pattern of their own, or want to paint a pattern onto the bowl, I have also included a blank design with no pattern, in .STL and .STP (STEP) formats to cater for a variety of CAD tools.

For those looking to scale the design up without losing fidelity, I have included a .STP file with the leaf design on it.

Enjoy!

--Change Log--
Dec 2025: v2 bowl introduced replacing the original. v2 incorporates a wider base and associated reduction in overhang angle to reduce the risk of poor surface finish near the base (I was seeing this on some of my own prints in certain materials).