Sponge holder / shelf (customizable)

Customizable sponge wall shelf.

You can easily change:
* size (default to small sponge)
* wall thicknes (default to 1.6, which is really ok, but 2mm might be better for bigger sponges)

There actually wasn't any sponge hold I would love to use on Thingverse - as these were either not best for my use or/and to fancy. I needed something easy to print&use. Please mind that having one might not be the best idea as micro pores in 3d model can be a really good living room for bacteria and spore