Step 1: Make the Candy Popcorn
Melt the white candy melts or chocolate in the microwave (15-30 seconds at a time, stirring in between).
Add neon food coloring and stir well.
Pour over the popcorn and mix gently to coat.
Let it cool on wax or parchment paper until hardened. Add edible glitter if using.
Step 2: Make the Frappuccino
In a blender, combine ice, milk, vanilla ice cream or yogurt, sweetened condensed milk, tonic water, vanilla extract, and flavored syrup.
Blend on high until smooth and icy.
Taste and adjust sweetness or color as needed.
Step 3: Assemble
Pour the frappuccino into a tall glass.
Top with whipped cream.
Pile candy popcorn on top or garnish the rim.
Add a decorative straw or glow stick (non-edible!) for flair.