As per the label, this variant of the Philips Avent Natural Feeding Bottle (125 ml) comes with a 0 m+ teat size, indicating a newborn/slow-flow nipple suitable for babies from birth. The teat is also available in various flow levels (slow, medium, and fast) that can be chosen based on the baby’s age and feeding needs. Please ensure you choose the appropriate teat size for your baby’s needs before purchasing.