Then I am confused...are you trying to determine how much would be left in the container? Or just what is happening to the container based on the amount that is left? In other words, are you just trying to determine how long to pour to end up with a preset amount of "stuff" left in the container? Guess I'm clearly confused on what you are really trying to determine from the analysis -- stress in the container, time of flow, impact of flow on container, etc.?