Tamarindus Indica, a tree native to tropical Africa, can grow to one hundred feet or more, with a massive trunk and a wide canopy of leaves. Its fruit is a pod full of sour pulp, which is used in Mexico to make a popular fresh water or agua fresca, known as tamarind water, agua de tamarindo. It is wonderfully refreshing, sweet and sour, and keeps well in the refrigerator so try making a big jug of it to drink over several days - it beats anything in a bottle hands down.

http://www.bellaonline.com/articles/art12828.asp

I'll have to go to our World Market and see if they carry the tamarind pulp. We used to drink a lot of tamarind tea when we lived in TX. I had no idea it had so many health benefits!

Good luck and enjoy! Tamarind is fairly widely available, but the jars of prepared puree do not work particularly well with anything sweet so it is well worth searching out the pulp.