Mix gelatin with 3 Tbsp. of cold water and let stand for 5 min.
Heat 1 cup of juice in a saucepan stirring constantly.
Add sugar if desired.
Remove from heat when vapor appears above the surface.
Add gelatin and stir until completely dissolved.
Add the remaining 1 cup of juice.
Pour into the desired container and leave in the fridge for several hours.
Delicious flowers drawn in clear jelly.