Pour the Sprite into a shallow dish or baking tray, spreading it evenly.
Place the dish in the freezer and let it freeze for about 2 hours, until it’s firm but not completely solid.
Remove the frozen Sprite from the freezer and break it into smaller chunks with a spoon or spatula.
Add the chunks to a blender, then blend until the mixture is smooth and slushy, about 30 seconds.
Pour the slushy mixture into glasses or serving cups, distributing evenly.
Serve immediately with a straw or spoon, enjoying the cold, fizzy texture.