Hardie's right, if we're going to cut the cup in half then it has to be done properly.
I'm happy to sort out the logistics of this, so long as I can find someone who has the skill and equipment to make a nice clean straight cut (there's nothing in my shed that would go close to doing the job).
Also we do need to wait for any overseas butterflies to make it home.
Personally I think a half-cup would make far more of a talking point than a full one...