The Mam principle Parents are demanding. At Mam, we are too. That's why, for over 45 years, we have worked with medical research & technological experts to develop products that are unique in function and design. Mam products support the individual development of every child and make everyday life easier for parents. 0 Months 1/4 - Extra slow flow 0+ Months 1/4 - Slow flow 2+ Months 2/4 - Medium flow 4+ Months 3/4 - Fast flow 6+ Months 4 - Ideal for thick liquids Just a recommendation. May vary depending on your baby's drinking patterns.