What is Aptamil First Milk Liquid? Bringing a baby into the world is a special and beautiful experience. Based on 50 years of research in early life science, Aptamil's professional team developed Aptamil's First Infant Milk. It is nutritionally complete and suitable for use as a breastmilk substitute from birth. First Infant Milk, made with 26% fermented dairy. Includes ready-to-use bottles of Aptamil Infant Milk. Encourages friendly bacteria to thrive. The bottles are made for optimised flow. Aptamil First Milk Liquid bottles are Pre-sterilised and ready to use hence preparation is not required. Why choose Aptamil First Milk Liquid? Based on 50 years of research in early life science. Nutritionally complete and suitable for use as a breastmilk substitute. Breastmilk substitute from birth. With a 26% fermented dairy-based blend. Includes ready-to-use bottles. Bottles are Pre-sterilised and ready to use .