Part of the Natural collection Suitable for ages zero to one Three-pack set includes three 4oz. (125ml) baby bottles and two natural response nipples flow Allow babies to control the milk flow, similar to breastfeeding Unique opening and tip release milk only when the baby drinks and not while swallowing or breathing, maintaining their natural feeding rhythm Wide, breast-shaped nipple gives a soft, natural feel to the babies for easy bottle-feeding No-drip nipple design prevents milk spills, ensuring a mess-free feeding experience Anti-colic valve sends air away from your baby's tummy, reducing discomfort Made from polypropylene and silicone for enhanced durability BPA, PVC, and phthalate-free means your baby's food is safe and no harmful chemicals Dishwasher safe for easy cleaning Microwave-safe design allows you to easily warm these bottles