date:Aug 14, 2012
xists an ideal volume of beverage flowing into the mouth, at which consumers feel most comfortable while drinking directly from bottles.
Therefore, we define the evaluation function of drinking ease in terms of the difference between the actual volume of fluid in the mouth and the expected ideal volume.
If this difference was small, consumers probably felt comfortable drinking the beverage, the researchers said, adding that they considered a design variable (opening diameter) and two state var