I think I may have a solution to the old problem of having a lebanese bowl on an egyptian or syrian hookah.
this is a jigger. It is a bar tending tool and they come in different sizes and styles. All one would have to do to make this an adapter would be to drill a hole through the center of the cups to make a path.
Frankly I don't see a reason to use a lebanese bowl on anything but a lebanese hookah.... but I had the idea so I figured it was worth putting down before I forgot it anyway.
I do hear lebanese bowls run smaller than egyptian. could be wrong
now I need to find a pre-made item for an adapter that uses female bowls on a lebanese hookah... hmmm