thin king

Good morning to all,

The Wine Vessel with a Secret

On one of King Henchitau's birthday, his good neighbour, king Horshuke,
presented him with a very special gift. It was a wine vessel with one cup,
all of a very unusual shape. Its base was like a pomelo, its spout a pear,
both connected in the middle by a banana, like the lower case letter g ,
while the cup was like a grape. It was symbolic of the great produce of
king Horshuke's kingdom. The vessel also held a secret which was
explained to king Henchitau who was very pleased with it.

On the next Kingdom Day, Henchitau decided to make use of the vessel
to test his officials and household. He assembled them in the great hall
and told them this, "This vessel, Wanpang, is filled full with a very special
wine which you can see. There is only this drinking cup, Wanpuay. The
wine will not fill this cup twice. My wish is to share this wine equally with
my queen; I drink from Wanpang and she drinks from Wanpuay. Can one
of you tell me how to pour out an amount as equal as possible as what
remains. The wine must not pass or touch any other container."

This was quite a puzzle; some thought that it was impossible, others
began to work on it. Nevertheless, it was an opportunity to show one's
talent before the king, and everyone tried very hard.

Well, before long, his son-in-law, Mengtahan, came forward with his idea.
King Henchitau was satisfied and very happy that it was Mengtahan who
solved the problem. And as a token of his appreciation and affection, he
presented the set, Wanpang and Wanpuay, to Mengtahan to share with
his wife Sekagnia.

Oh, oh, this is really a puzzle for us!
What was Mengtahan's solution?

Have a nice day.
Ronald