I printed these two bowls on my kit-built FlyingBear P902 printer. These two spiral-fluted bowls both measure 200 mm diameter at the top, 140 mm diameter at the base, and are 100 mm tall. Note that the STL models are solid; that is, in the STL models, the bowls are not hollowed out. To print them as bowls, you MUST use the 'spiralize' or 'vase-mode' settings in your slicer. This setting will not print any infill or top to the bowls, but will print a bottom. (If you are not sure how to use the 'spiralize' or 'vase-mode' settings in your slicer, a search on Google will direct you to a number of instructional sites as well as videos.)

My printer has a 0.4 mm nozzle. I printed my bowls using Cura 2.4 as the slicer. Besides turning on 'Spiralize Outer Contour' under the 'Special Modes' setting, I used a layer height of 0.3 mm, and a line width of 0.6 mm. The bottom thickness was set to 0.9 mm. In this version of Cura, I also had to set 'Outer Wall Wipe Distance' to 0. (This was to work-around a bug in the 'spiralize' setting in Cura 2.4 that causes a small z-hop after each 'layer'.)

My two bowls were printed with transparent blue PLA filament. I designed the actual models in an old version of Alibre 2012. (This software is now called 'Geomagic Design'.)

I do not believe that these bowls will hold water; I noticed on my prints, there seemed to be small leaks at the base of the bowl.

As I stated at the beginning of this description, the bowls measure 200 mm diameter at the top. If the build area of your printer is smaller than this, you can just use the scaling function of your slicer to reduce them in size.

If you have any questions about these two bowls, post them in the comments and I will do my best to answer.