I have still a bit of trouble with the staining. Very stained after cycle but a h2o2 soak has it good as new. I got the plastic sterilizing cup from the meluna web site and it's superb too. My only regret is that I ordered just before I learned about the glitter cups! I did get a free sample. It's a medium green Meluna Klassik with a ball stem. Pretty, but not sparkly.
Perhaps a medium glittery meluna with a stem is in my future :)