1 can frozen cranberry juice cocktail
1 can frozen unsweetened grape juice
7-Up or diet 7-Up

Mix juices together in a one gallon container. Add water to fill container. (This takes more water than the cans call for.) Fill glass 1/2 full of juice and 1/2 full of 7-Up. This is very low-cal if diet soda is used and very refreshing.