It’s called chicha morada and it’s made from corn of the same color. Actually, I was amazed to find corn in dozens of different colors. Apparently, the Incas took the growing of corn to new heights. This drink was available everywhere. I only tried one glass. They sell the stuff on the street and I wasn’t really sure about the purity. This glass I bought at the local culinary school lunch sale they have during the weekday lunch hour. It was okay. It tasted like weak grape juice. This is the non-alcoholic version. There is also a version that gives a slight buzz.