I haven't been able to find expendable, but it is effecting the way potions work. The problem I have is that a stack of 20 potions that show expendable disapear from inventory after I click it. When I zone the stack of potions shows up in inventory again. 
 
 I figured if I made them not expandable anymore then I could just detroy them when they are used up. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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