When the temperatures rise, you can be sure to find my fridge brimming with colorful pitchers of aguas frescas. These popular Mexican coolers are made with fresh fruit juice and served with plenty of ice. Perfect for a crowd or a picnic, aguas are easy to make. All is you need is a blender, fresh fruit, a bit of creativity and you are ready for summer. Jamaica (hibiscus flowers) is tart and tangy, but add fresh melon juice to the mix and you naturally sweeten your agua without relying on too much sugar.