I was asked to design a Christmas ornament candy dish. This is what I came up with. This was printed with a .8mm nozzle at .4mm layer height. 15% Infill seems to be work well. I have one printed with 0 infill and the top is very weak. The crown isn't the best design but with my extremely limited design knowledge I think it came out pretty well.
For the holes to put the clip in, I used a soldering iron to melt the main dish. You can use a drill as well. Put the crown on the lid and mark the 2 holes with a sharpy. Then either drill them or melt them.
Used a .4mm Nozzle (don't have to though). Infill is 15%, depending on filament, may need 20%.