Meet the philips avent scd29001 natural newborn pp bottle set! philips avent bottles have an airflex valve that works with the baby's natural feeding action. the natural way to start bottle feeding! it has been proven by clinical test results that it reduces colic formation. in a clinical trial, it was observed that 2-week-old babies fed with the philips avent bottle experienced less colic than babies fed with a conventional bottle. easy to hold, easy to assemble, easy to clean. there are 4 bottles in the set, 2 of these bottles are 120 ml and 2 of them are 240 ml. age range: from birth Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.