Start by chopping the watermelon into bite-sized cubes and place them in a large mixing bowl. Add your choice of fresh fruits, such as berries or melon pieces, along with the drained fruit cocktail for a burst of flavor. Gently mix everything together using a wooden spoon.

Pour the creamy strawberry milk over the mixed fruits in the bowl. Use a spatula to carefully fold the mixture, blending the milk with the fruits without smashing them, achieving a lovely pink hue.

Add a generous amount of ice cubes to the fruit mixture. Slowly pour in the carbonated beverage and stir gently to mix, ensuring the fizz remains intact.

Scoop portions into glasses and serve immediately for the best experience, as this ensures the carbonation remains lively.