My first try in blender to model something i needed.

• toothbrush_holder.stl
  Its oke but is has some problems with the normals. So for my next attempt i used OpenScad this is realy nice because you can use parameters to make a holder for more then 2 toothbrushes.

print one of the stl's mount it on a wall and hang your toothbrush in it.

or

use the OpenScad modify it an make your own ;-)

• toothbrush_holder.stl will work but has some normals issues