2 frozen limeades
1 frozen lemonade
6 cups of water
2 litres of Fresca (I used Squirt when I couldn't find Fresca)
1 & 1/2 cups tequila (more or less to your taste)
triple sec to taste....I used about a cup.
Mix all together and serve over ice with fresh lime wedges. This makes quite a bit, so you could probably halve it and it would be plenty! Any leftovers can go into the freezer for some frozen margaritas later!