A fairly simple model, with a trick: You have to slice it without using horizontal walls. That way, you can set the infill however you like and automatically achieve a self-draining dish. The print I actually did uses hexagons, but you can pick whatever infill you like. There are pre-sliced triangles and cubes for you as well.
Printable on a Prusa Mini.
Credit for JCW for showing me the infill trick with his bottle carrier design.
The author marked this model as their own original creation.