Add frozen blueberries and ice cubes (if using) to the serving glass cup.
Also add lemon juice and pour chilled water over, enjoy!
If not serving immediately or if you are making large batches, you can store the flavored water in a jug in the refrigerator and keep it chilled until ready to serve.
Make sure to serve the flavored water chilled for best results.
Add ice cubes as needed, when it's ready to serve the drink!