Ink sample vial holder

This is my first model, and I printed using the P1S. I assume it's compatible with all printers, but I don't know enough about what determines compatibility. This is a not-so-fancy way for holding 5ml ink samples for the vials that are often used by stationery stores. It's also helpful for avoiding tipping the vial over while filling a fountain pen. The diameter of the hole is 17 mm.