Bring 2 cups of water to a rolling boil in a medium saucepan. Remove from heat and add the green tea bags or loose leaf. Steep for 3 to 5 minutes.

Carefully remove the tea bags or strain out the loose leaves, and let the brewed tea cool to room temperature, or refrigerate for about 30 minutes.

In a large pitcher, pour the cooled green tea, add 1 cup of coconut water and ½ cup of mango juice. Stir gently and mix in ½ cup of pineapple bits.

Fill glasses with ice cubes, pour the tropical mixture over the ice, and stir gently to distribute flavors.

Garnish each glass with a slice of fresh pineapple and serve immediately.