I got inspired by some beautiful vases with a similar spiral pattern, so I decided to make my own. The large base makes it very stable, ideal for holding some dried flowers.

I printed mine in Vase Mode. 0.15mm and 0.2mm layer height both work well.

It's not waterproof by itself, so I'm experimenting with an insert. I've uploaded the insert file, but I'm still testing it. Print the insert solid (2 perimeters) and a higher nozzle temperature than normal. Prusa has an article about making watertight prints: https://help.prusa3d.com/article/watertight-prints_112324