Excessive quantities, to be determined at the discretion of security and/or embarkation personnel,
I beg to disagree with you as the above sentence here is key. What you brought onboard certainly is not excessive, however depending on the port, the day, the hour, the mental attitude etc., of the security and/or embarkation personnel comes into play. In one set of circunstances 2 or 3 cases of non alcoholic beverage may not be deemed excessive but at another it may be, just depends and one takes that chance when bringing beverages aboard.
I'm sure that if a person is reasonable in the amount they bring they will not be bothered.