Guarapo is fresh sugar cane juice. It has a very light flavor and is extremely refreshing on a hot day. In fact, the sugar content of guarapo makes it just slightly sweeter than orange juice. Standard sodas can have as much as four tablespoons of sugar in one can. You'd have to boil down more than a gallon of guarapo to produce that much pure sugar.
The sweetest and most flavorful guarapo is available in winter when there is not as much rain.