Here is a fantastic ring holder with voronoi or low poly base according to your printing skills or tastes. I hope you like it and good print

Print instructions

Print all objects at a resolution of 0.15 or more for a better result.
for the base you can choose whether to print the simpler low poly one without the need for supports or the voronoi one as shown in the photo by inserting the "tree support" file as part of the base, which must then be removed in post processing. A little complicated operation to remove the tree supports so I recommend printing the low poly one if you don't have a double extruder to print soluble supports.