Voronoi pen holder - amazing but difficult

I found on internet the STL of a voronoi vase that could not stand up. My wife and daughter liked it and wanted it as pen holder.
I modified a bit just to stand and now it is very nice as you can see from the pictures.
Use a standard print, DO NOT USE VASE MODE.

It is quite difficult to print but rewarding. With the current size it can hold up to 30 small pens.

I hope you like it, I challenge you to print it ;)

Enjoy from Italy.