• High-quality silicone nipples with an exclusive anatomical shape that adapts to the baby's jaw. • Size 1 recommended for babies from birth up to 6 months. • Small S-hole suitable for water, breast milk, or infusions. • Airtightness during sucking helps promote nasal breathing. • Flat surface that facilitates the sucking action and aids the development of the jaw and palate. • First Choice anti-colic system that mimics the mother's nipple for natural feeding. • Includes 2 units.