Integrated Airflex Venting value helps reduce colic and discomfort Nipple features slot-shaped opening to adjust the flow rate to baby\’s preference Simply turn the bottle to line up the I, II or III marking with your baby\’s nose to choose between slow, medium and fast flow. Compatible with all Philips Avent Classic bottles The nipple is made of flavorless, odorless silicone that resists discoloring. Dishwasher safe BPA-Free and made of soft, durable, flavorless silicone Clinically proven to reduce colic and discomfort
