Friendliest.app says
Fanta® Wild Cherry Frozen Slush is free of all the top 8 food allergens - gluten/wheat, milk, fish, shellfish, peanuts, tree nuts, eggs and soy.

Ingredients: Carbonated Water, High Fructose Corn Syrup, Water, Citric Acid, Natural and Artificial Flavors, Quillaia Extract, Sodium Benzoate (To Protect Taste), Yucca Extract, Red 40.