Add 2 cups of water to a glass measuring cup and heat in the microwave until hot but not boiling.
Whisk the zero sugar blue raspberry drink packet into the hot water until entirely dissolved.
Slowly sprinkle the beef gelatin into the liquid while whisking constantly to prevent clumping.
Continue whisking until the mixture is completely smooth and clear. Skim any foam off the surface with a spoon.
Place your silicone bar mold on a baking sheet, then carefully pour the liquid into the mold cavities.
Transfer to the refrigerator and chill for 2 to 3 hours or until the bars are completely firm.
Gently release the bars from the silicone molds and store them in an airtight container in the fridge.
