Add the contents of one Jello to a mixing bowl. (I started with strawberry)
Bring one cup of water to a boil.
Add the boiling water to the jello and whisk for one minute, until the Jello is dissolved.
In another mixing bowl, add 1/3 cup reduced fat sour cream. Add to that 1/2 cup of the Jello mixture. Whisk together until the sour cream is dissolved.
Add the sour cream mixture to the 10 dessert cups, then put the dessert cups in the freezer for 15 minutes.
Add 3 tablespoons water to the original Jello. Give it a quick whisk and add it to the dessert cups. Place in the freezer for 15 minutes.
Repeat steps 1 through 6 until you have all six layers.