1. Wash, peel, and pit the mangoes.
2. On a cutting board, cut them into small pieces, then place them in the bowl of a blender.
3. Peel the bananas and slice them.
4. Also place them in the blender bowl.
5. Wash and squeeze the oranges.
6. Pour the juice and green tea over the fruit pieces in the blender bowl.
7. Blend for a long time, then pour the mixture into a pitcher and refrigerate until ready to serve.