Pour the boiling water in to a blender and then the gelatin mix.
Blend on the lowest setting for a couple seconds until the gelatin is dissolved.
Pour in the cold heavy cream and blend on the lowest setting until well combined. (Just a few seconds).
Pour into your popsicle molds, add the sticks and freeze for at least 6 hours.
Note: For my popsicle mold, I had to wait 1/2 hour until they were had frozen enough so I could put the popsicle sticks in. I just set a time so I wouldn't forget to do it.
To store them, I used plastic sandwich bags (no ziplock) and stored in a larger ziplock bag. You could also wrap them individually in plastic wrap. Or just keep them in the mold until you eat them.
When you eat these jello pops, they will be hard and have different texture. That is the gelatin. I personally liked them but some people did not. I feel for 1.1g net carbs they were well worth the different texture.
Some people had trouble with the cream mixing with the gelatin. I think it was the heavy whipping in the blender though I'm not sure because it's never happened to me. For these 4 batches, I just mixed them in the blender for a few seconds before pouring and I had no problem.
If using a blender, make sure to clean it out right away as the gelatin will be very sticky in the container.