This document discusses a collaborative project between several Fab Labs to design and 3D print customizable cups. The goals were to experiment with open design, co-creation and local production. Participants modified a parametric cup file, 3D printed it, took a photo, and shared results. Feedback noted interest in the machines over concepts, a child's enjoyment, and ideas to improve openness. Next steps include an online platform to collect variations and try more complex objects while tracking production data.