Cut both grapefruits in half horizontally and then squeeze all of the juice and pulp into a large mixing bowl. Large chunks of fruit are great, but remove every bit of the membranes and pith that may get in the mix. You might also need to spoon out a few tiny seeds. You will need about 2 cups juice/pulp for 4 (4-ounce) popsicle molds.
Melt the honey and then add it to the grapefruit. Use a whisk to blend.
Now pour the grapefruit-honey mixture evenly into 4 (4-ounce) popsicle molds and freeze for at least 4 hours before serving/eating.