Cool Whip, (optional)
1 Drain the pineapple and set aside.
2 Pour the pineapple juice into a saucepan.
3 Add the water and bring to a boil.
4 Remove saucepan from the stove and stir in the gelatin powder.
5 Stir until the gelatin mixture is dissolved.
6 Add the cherry pie filling and cola.
7 Pour mixture into a serving bowl or gelatin mould.
8 Let chill until mixture starts to thicken.
9 Fold in the reserved crushed pineapple.
10 Refrigerate until firm.
11 Serve topped with Cool Whip, if desired.