Medela contact "size L" teat cups help mothers with flat, inverted or sore nipples, or with a too intense milk-out reflex, to breastfeed their babies. Contact teat cups make breastfeeding practical, comfortable and durable. These Medela teat cups are designed to help mothers feed babies who have difficulty latching on by providing them with a larger, firmer latching surface. They can also be used by mothers who have sore, flat or inverted nipples, or a milk discharge reflex that is too intense. Contact teat cups are specially designed and manufactured to facilitate close contact with the baby. It is recommended to use to facilitate breastfeeding in a practical, comfortable and durable way.