Elephant Ink Sample Vial Holder

This is an ink sample vial holder, it helps to prevent the ink vial from tipping over when filling a fountain pen. It should be suitable for 2mL ink vials, the diameter of the hole is 13.5mm. The trunk's radius of curvature is 6.5mm, it can hold pens with a larger body radius but it's preferable the pen radius is within the mentioned size. A capped or posted pen may not balance in the trunk properly since the width of the model is only 50mm.

Overall size is 50mm x 50mm x 35mm (height).