Glowing Jell-O Shots

Two-layered pineapple and orange Jell-O shots made with tonic water so they glow under black light.

Ingredients

2 cup	480 ml	tonic water, divided
2		packages Jell-O (two flavors; we used pineapple and orange)
1 cup	240 ml	water
1 cup	240 ml	vodka

Make the first layer: Pour one cup tonic water into a pot over high heat. Once it comes to a boil, add the pineapple Jell-o mix. Whisk until the mix has dissolved, then pour in half a cup of water and half a cup of vodka. Stir to combine.
Pour the Jell-o into shot glasses, filling them about two-thirds of the way up. Place in the refrigerator to chill, 30 to 35 minutes.
Make the second layer: As they set, start making the orange Jell-o, following the same process used for the pineapple Jell-o.
Top each of the pineapple Jell-o shot glasses with the orange Jell-o mixture. Return the shots to the fridge to set, 2 to 3 hours.