This 20.33mm height print completes in 30minutes with 0.05mm layer height and uses up only 1g of filament because of the magic of vase mode. I wanted to produce a watertight vase with natural looking tree trunk features and found this nice 3D scan on Sketchfab by matousekfoto:
https://sketchfab.com/3d-models/wood-chopping-trunk-base-log-ba19a59fdd7f4f01ac5e3f8700b90775
I had to cut some top layers and bottom layers after placing the model on the plate so that the top stays open and the bottom was wide enough. I suppose it also improved my chances of success when I scaled the model down to 25%.
Here's the proof that it holds water:

The author hasn't provided the model origin yet.