Who wouldn't know, the cups with paint for painting by numbers are small, they bend when grasped by only one side and can be easily turned over. However, the problem can be solved with a simple holder. Which provides a stable base, looks good and is not overly large.
Print settings:
Material: PLA
Infill: 15% (10% can be used with a 3D honeycomb pattern, but that's very borderline)
Layer height: .30 mm
The author hasn't provided the model origin yet.