Bottom is hollow with 3.2mm walls (results in 100% plastic with 4 perimeters and a 0.4mm nozzle).
I filled the bottom with plaster, you could use concrete, sand, metal balls,… to make it hard and heavy.
Top cover is press fit; I secured it with super glue to make it water tight.
Use at own risk regarding food safety of the filament you use or regarding shattering if used with unreasonable force ;-)
The author marked this model as their own original creation.