This refreshing gin cocktail gives us some serious summer vibes - perfect for a beach vacation, picnic, or rooftop party. To make it your own, mix 1.5 oz. Tanqueray TEN, 2 oz. Grapefruit Juice, and 2 oz. Watermelon Juice. Pour the drink into a glass or watermelon half - whatever fits your style. Just tell your crew to BYOS -bring your own straw.