This attractive twisted decorative planter can be printed without supports. On the full size model the walls are 5mm thick so it will be waterproof. For the photo with a plant, the planter was scaled to 66% and printed in white matt PLA with 10% gyroid infill and a layer height of 0.2mm.
Since there are no drainage holes it is recommended to add an insert to hold the plant. This is using an orchid pot which I scaled within the slicer to fit the dimensions of my pot. I used https://www.printables.com/model/928940-small-orchid-pot
The author marked this model as their own original creation.