I went to a Mexican Juice, shake, and fruit bar the other day and noticed that one of their Agua Fresca offerings was Cebada. This is barley in English.
It reminded me of the cold tea that I was given with meals while working at Korean and Japanese operated restaurants during the summer. I believe it is called "Bori-cha."
How common is drinking this cold wheat based drink around the world? Apparently the Central American countries have this as well.
Where did it start -- the Romans?