A cup fill with a liquid that increases your Hit Points you ask?  Of course I  
know about it, it is located in this country!  It is said to be surrounded by  
gold coins.  What is told about its magic powers is all true.  I have even     
tried to get to it so that I can challenge Khalal my self.  The only problem   
is THE LAND OF ETERNAL CONFUSION.  I couldn't get out of there.   See, the cup 
is located in this country but you cannot reach it unless you go to THE LAND OF
ETERNAL CONFUSION first.                                                       
All I know is that you have to START BY GOING NORTH once trapped in the evil   
land, but I don't know anything else.                                          
Let me give a word of advice: do not even try to go there unless you know your 
way thru this forbidden land and your fighting level is at least 5.  You could 
try and risk your life at lower levels but believe me, you will die miserably.