In a medium-sized mixing bowl, combine the blue raspberry jello powder with hot water, per the instructions on the box.
Stir until the granules have dissolved.
Then mix in the cold water as instructed on the box.
Pour the Jello into clear cups.
Divide the Jello evenly between 5-6 plastic cups.
We use 3/4 cup of Jello to fill five blue raspberry Jello cups.
Next time, I would reduce it a little so we could fill six cups instead.
Refrigerate the Jello.
Let the blue raspberry Jello cups sit in the refrigerator for 4-6 hours until they're completely set.