Beat the summer heat with this refreshing vodka watermelon cooler. The cocktail is made by blending fresh watermelon chunks with vodka, lime juice, and a touch of mint. The result is a light and fruity drink that is perfect for sipping by the pool or enjoying at a backyard barbecue. Serve it over ice, garnished with a sprig of mint and a watermelon wedge, for a refreshing and thirst-quenching beverage.