I printed a bunch of my original tile and thought it was good.
https://www.printables.com/model/351778-beautiful-tessellating-spirals-a-one-piece-tiling-
And then decided to make a bowl version. Enjoy!
I haven't printed them yet, but I will post a photo when I have one.
Oh, also, they should stack.
The author marked this model as their own original creation.