The original base for this model used the Nutella jar as a sweet container. Kilner jars(mason jar regular mouth) are obtainable in various sizes. I bought the small one from Sainsburys. I redrew the top half containing the thread in Onshape and combined it with the original STL in Blender. Seems to work fine. A little internal stringing but no major problems. I have another mod for use with a Coffee jar too see above Douwe Egberts 190g jar.
The author remixed this model.