Product Description Features A unique nipple with a v-shaped valve at the base, enabling a venting process, thus providing a smoother flow of liquid, enhancing drinking performance, and preventing colic. Designed to resemble breast feeding and help form a baby’s palate by improving suction. Made from high-quality medical-grade silicone. Volatile and nitrosamine safe. Odorless, tasteless, and guaranteed not to perish. Age limit 3 – 6m