1/2 c. cold water
2 packets unflavored gelatin
1 1/2 c. boiling water
12 oz. can unsweetened frozen concentrated juice
1/2 c. cold water

Add gelatin to 1/2 cup cold water and stir until mostly dissolved. Add 1 1/2 cups boiling water and stir until completely dissolved. Add frozen juice and stir until dissolved. Stir in 1/2 cup cold water. Add chopped fresh fruit of your choice. (Tart orange juices, etc. may need something sweet such as sliced banana to counteract the tartness.)