Alcohol free grapefruit jello shot
1 1/3 C. grapefruit soda
1 T. lime juice
2 envelopes Knox gelatin
2/3 C. grapefruit juice
1 T. sugar
Pour soda and lime juice into a small saucepan and sprinkle with the gelatin.  Allow the gelatin to soak for a minute or two.  Heat over medium heat and add sugar until gelatin is dissolved, stirring constantly, about 5 minutes.  Remove from heat.  Stir in the grapefruit juice.  Pour into a loaf pan or mold.  Put in the refrigerator to set for a few hours or over night.