A nipple (bottle) is a soft, often rubber or silicone, attachment designed for feeding infants. It mimics the shape and function of a human nipple, allowing babies to suck and drink milk or formula from a bottle. Nipples come in various sizes and flow rates to accommodate different ages and feeding needs. These nipples are typically used with baby bottles, which hold liquid nourishment. They are essential for parents who choose to bottle-feed, whether using expressed breast milk or formula. Proper cleaning and sterilization of both the nipple and bottle are important for maintaining hygiene and the baby's health.