Hanging Cupholder for 18mm (~5/8") wood rail, 80mm (~3") cup

Cupholder for my kids' beds, to hang on 17.8mm thick wooden rail (model uses 18.9mm gap, not quite ¾").  Included .f3d files so you can personalize.  

• The blank version is properly parameterized 
• The mermaid and pikachu ones can still be modified by going through the dimensions used throughout the design history

Best to print on its side, using supports for just the top inner surface of the cup holder