Place the ingredients into a high powered blender, like in the order listed: water, cranberries, oranges and banana.
Blend until smooth and creamy. If desired, add in 1-2 tablespoons of maple syrup. Sometimes I want this more tart and sometimes I want things a little sweeter!
Notes
If you are using a standard blender, you might need to puree a few times until smooth.
A warning that this smoothie is a bit tart! While I love that sour/tart flavor of cranberries and orange, you may prefer it a little more sweet. In that case, add a little stevia, agave, maple, honey, whatever you prefer in with the ingredients. You can also decrease the cranberries to 1/2 cup.