About this 3D model
This voronoi-effect toothbrush holder is a simple remix of Clement's Pencil Case - Voronoi. I punched a few holes in the bottom (I did that in Windows' 3D Builder - and reduced the number of polygons at the same time) to help water not stagnate at the bottom. The default size is probably a bit too small (see picture), so you could probably scale it by x1.3.