Shaker cup ball

thingiverse

Here is a design for a ball-shaped attachment that converts a standard cup into a shaker cup. To print this model without any support material, simply orient the STL file as instructed. With a little tweaking, this device should work perfectly on most regular cups. Feel free to scale up the design if needed, but be aware that reducing its size may lead to printing issues. I created this attachment using OpenSCAD, a popular software tool for 3D modeling and design.