There's no rule that says warm-weather cocktails must be served with tiny umbrellas. We updated this tiki-bar fave of rum, pineapple juice, lemon juice, and coconut water with an unexpected garnish, a round of dried pineapple.
In a small pitcher, combine pineapple juice, coconut water, orgeat, lemon juice, and white rum.
Fill a wide-rimmed wine glass three-quarters with crushed ice. Pour pineapple mixture over ice; pour dark rum over the back of a spoon into glass, creating a darker layer on top. Garnish with dried pineapple round; serve immediately.