A Golden Snitch that you can unscrew and hide your very own secret treasure inside. I printed out about a half dozen of these in yellow and painted them with some nice golden acrylic paint. The spherical part has an outer diameter of ~2.4cm.
This print has supports built right in so it should not require additional supports. It does require good adhesion to the build plate for the wings though. Print in gold if you have it, paint later if you don't.
Remove the ring of supports holding up the lip of the half without wing holes. Clear out the inside of both halves of any print error blobs and make sure it screws on properly. Such errors are more likely if your printer tends to cobweb or doesn't handle overhangs well. Next, paint if necessary. Use heat such as a hairdrier to gently warp the wings into the desired curved shape. Use a bit of glue on the outside and inside to fix the wings in place.