Prepare a shaker full of ice then add the Cran-Raspberry juice and the Sprite together until they fill about 2/3 of the shaker, then add as much vodka or gin as you'd like; cap and shake vigorously. Layer the bottom of a glass with crushed ice, then cover that with raspberries, and then again with more crushed ice. Pour the contents of the shaker into the glass..and ENJOY!!