Cut your lemons in half and use a spoon (a serrated grapefruit spoon works great if you have one) to scoop out the insides as much as you can.
Heat the lemonade in a pan over medium heat and stir in the packets of gelatin slowly until they dissolve. Add the lemonade and gelatin mixture to a bowl and pour in your vodka liquids. Stir until combined.
Transfer the liquid into a pourable container and place your lemon halves into a muffin tin to keep them upright. Pour in the liquid until each half is full and refrigerate for 4 hours or until set.
Remove the tin once the lemons have set and slice into slices right before serving.