Brew the green coffee according to package directions and allow it to cool completely until room temperature.
Add frozen strawberries, acai powder, white grape juice, lemon juice, and simple syrup to a blender. Blend until smooth and bright pink.
Pour the mixture through a fine mesh strainer into a pitcher, pressing with a spoon to remove excess pulp for a smoother texture.
Stir in the cooled green coffee and cold water until fully combined and evenly colored.
Fill two 16-ounce glasses halfway with ice cubes and a few sliced fresh strawberries.
Pour the refresher over the ice, leaving about ½ inch at the top. The drink should look lightly translucent and vibrant red.
Stir gently before serving to evenly distribute flavor and chill.