Spread out jello shot cups on a cookie sheet and set aside. Pour 1/2 cup of the white cranberry strawberry juice into a bowl. Using a bowl with a pouring lip will make it easier to fill the jello shot cups later.
Mix the hot juice into the bowl with juice and gelatin mixture. Stir until all of the gelatin has dissolved.(optional) If you want a sweeter jello shot, add the sugar to the bowl and stir until it has dissolved.