Cut the oranges and lemons into small wedges that fit comfortably inside your silicone mold cavities. Remove any seeds from both. Place two orange wedges into each cavity of the silicone mold. Take one lemon wedge and roll it tightly between your fingers so it is compact, then tuck it into the cavity alongside the orange wedges. Repeat with all six cavities.

Pour the Garnacha slowly and steadily into each cavity over the citrus wedges. Fill all the way to the top. Pour slowly so the citrus stays in place as the wine fills around it. If any wedges float or shift, gently press them back into position before the wine settles.

Carefully transfer the filled mold to the freezer. Freeze overnight or for at least 6 hours until the cubes are completely solid all the way through. Do not rush this step. A partially frozen cube will melt too fast and you will not get that slow gradual wine and citrus infusion that makes this drink so good.

Remove two wine ice cubes from the mold and place in a wide glass. Pour your lemon lime soda of choice directly over the cubes. Watch as the soda hits the frozen wine and immediately starts to take on that deep red color. Serve immediately and enjoy slowly as the cubes melt and the drink becomes more deeply flavored with every sip.