Under Cabinet Tissue Box Hanger Holder (STL and Parametric FreeCAD FCStd)

NewScottie.FCStd is FreeCAD source.
Adjustable parameters are in items of Top and TissueBox in NewScottie.FCStd, FreeCAD source.

Default sizes are:

   Tissue box: 64.6 mm x 110.0 mm
   Line size: 4.4 mm x 12.0 mm
   Cabinet shelf thickness: 16.0 mm
   

Filament: PLA 
Support material: No
Build plate adhesion: Skirt
Wall thickness: 2.4 mm