Toss strawberries with sugar, and let sit overnight in refrigerator. Cut lemon, reserve two slices. Juice the rest. Mix together the lemon juice, strawberries, apple juice, and soda water. Add slices of lemon (decor, really). In glasses, put ice cubes, and a slice of apple. Pour drink in, and serve.
The best Fruit Cooler drink you've ever drank!