Fish Tank Bauble

The round fish tank looked like an ornament but needed the top to complete the look. Here it is.
Hole for feeding, but provided a cap without it.
Slot for a ribbon to go through the hook/loop, wire ribbon will stand up and make it look like it's hanging, but provided version without this as well.
Glue together or use some screws, resize as required.
Print cap upside down, print hook on its side, couple of perimeters is sufficient.

Enjoy.