The 2011 Hangar One Vodka Blimp Tour - Landing Cocktail Contest: Milwaukee - Purple Drank

2 oz Hangar One Straight vodka
3/4 oz Hangar One Fraser River Raspberry vodka
1/2 oz Simple Syrup
3 cubes Watermelon
2 Blackberries
4 Mint Leaves
Garnish with Mint Sprig