Start by dipping the rims of each glass into the frosting, dip 1/3 of the rim into green sugar sprinkles, 1/3 into purple sugar sprinkles and 1/3 into yellow sugar sprinkles as shown.
Pour lemonade into a small pan and sprinkle in the unflavored gelatin.
Allow to soak for about 2 minutes. Turn heat on low, whisking constantly, until the gelatin is dissolved, about 5 minutes. Remove from the heat, if using alcohol, stir in vodka and sweetened condensed milk.
Using 3 different bowls, divide the gelatin mix between them, pouring about 1 cup in each bowl. Use food coloring to color each. Use 4 drops of food coloring for each bowl. Purple: 4 drops, Green 4 drops, Yellow 4 drops.
Using a baster, add about one tablespoon of the purple gelatin to glass, refrigerate until set. Once set, add about one tablespoon of yellow gelatin to the glass, repeat with the green.
When all layers are fully set, remove from the refrigerator and top with whipped cream and sprinkle with colored sugars.
Enjoy!