
Pour the water into a cup. Add the butterfly pea flowers and stir or soak for a few minutes. If the color isn't strong enough, add more flowers.
Strain the butterfly pea tea with a mesh strainer.
Add the sugar to the butterfly tea and use a spoon to stir until fully dissolved.
Mix the lemon juice with the sweetened butterfly pea tea.
Fill glasses with ice.
Pour the butterfly pea lemonade over the ice, up to about half of each glass.
Fill the rest of each glass with soda water and enjoy right away.