For the Coconut-Pineapple Cooler: In a large quart-size jar or bottle, combine 2 cups pineapple juice, 1 cup coconut milk, and 2 tablespoons lime juice. Shake or stir well. Taste and add maple syrup if you want it sweeter. Pour into cups over any ice you have. Garnish with a pineapple wedge.
For the Spicy Pineapple-Ginger Fizz: In each serving cup, add a pinch of grated fresh ginger. Pour 1/2 cup of the base mixture (from step 1) over the ginger. Top with 1/4 cup ginger beer. Stir gently. Garnish with a pineapple wedge.
For the Pineapple-Lime Agua Fresca: In a large jar, combine 2 cups pineapple juice, 2 tablespoons lime juice, and 2 cups sparkling water. Stir gently. Pour into cups over ice. Garnish with a lime slice or pineapple wedge.
To serve all three: Fill each cup about halfway with ice (if you have it). Pour the drink over the ice. Add garnishes just before serving.