1/4 cup coffee-flavored liqueur (such as Kahlua®)
1/4 cup lemon-lime soda (such as Sprite®)
1/4 cup vodka
Gently layer the coffee-flavored liqueur, lemon-lime soda, and vodka into either a shot glass or a cocktail glass filled with ice. This is a layered drink so pour them in the order listed and do not mix the layers before drinking! Drink with a straw until all layers are gone.