The liquid changes the flavour, texture and nutrition of the bowl. “Milk alternative” is a broad shelf category, not one interchangeable product.
Taste and texture
Dairy milk, soy, oat, almond, coconut and other drinks differ in sweetness, thickness and how quickly cereal softens. Unsweetened versions may taste different from the product used in a recipe or restaurant.
Check fortification
Calcium, vitamin D, vitamin B12 and other additions vary by product and country. Shake products when the package instructs, because minerals can settle.
Allergens and suitability
Soy, dairy, nuts and other ingredients can be allergens. Some products are not nutritionally equivalent for children or medical diets. Use local professional guidance where suitability matters.
Price and waste
A shelf-stable carton may reduce waste for occasional cereal use, while a large refrigerated package may offer better unit value for a household that uses it quickly.