Separate frozen fruits in their specified quantities on a baking sheet or cutting board.
Start with the red smoothie layer. Blend together strawberries, raspberries and ¼ cup coconut water. Pour into a separate bowl or cup.
To make the orange layer, blend together mango, oranges, ½ banana, and ¼ cup coconut water. Transfer to a separate bowl or cup.
For the yellow layer, blend together pineapple, 1 frozen banana, and ¼ cup coconut water. Transfer to a separate bowl or cup.
To make the green layer, blend together spinach, 1 frozen banana, and ¼ cup coconut water. Transfer to a separate bowl or cup.
Lastly, make the purple layer. Blend together blackberries, blueberries, acai, and ¼ cup coconut water. Transfer to a separate bowl or cup.
Arrange your bowls and cups of smoothies by color. Use a spoon to layer in each color into a large glass, starting with purple at the bottom. Add about 1 tablespoon at a time, and a total of 3-4 tablespoons in each layer. Be careful not to add too much at once, or the colors will run together. Layer green next, then yellow and orange. Finish topping off the rainbow smoothie with the red layer.