The soda is crafted with carbonated water, sugar, acids (citric acid and malic acid), natural watermelon and melon flavourings with other natural flavourings, preservative (potassium sorbate), acidity regulator (sodium citrates), and vegetable and plant concentrates (carrot, safflower). These ingredients contribute to its distinctive taste and appearance.​

Schweppes Watermelon Melon Soda is free from common allergens, including barley, celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, nuts, oats, peanuts, rye, sesame, soya, sulphur dioxide/sulphites, and wheat. It is also suitable for both vegans and vegetarians.