In a blender;
Put 6-8 cupfuls powdered lemonade with 2-3 cups water or frozen (with 2 cans water)
2 cups watermelon cut up with no seeds
3-4 big springs fresch mint
1-2 cup orange juice
10-12 ice cubes
Blend and then add a 2 liter of 7-up.
Refreshing and yummy.