The Lansinoh Feeding Bottles 2 x 240ml was created specifically for your little one to enjoy your expressed breastmilk even when you're apart. The Natural Wave stimulates your baby's instinctive sucking movement for natural oral growth and helps you switch effortlessly between breast and bottle so you may keep your established nursing routines, based on more than 50 years of research. According to extensive studies, a baby's sucking manner differs significantly from that of adults and contains three important processes. The initial latching on, peristaltic tongue movement (in which your baby's tongue moves in a wave-like fashion), and swallowing are all examples of these. The ability of an infant to conduct the peristaltic tongue movement is extremely crucial since it promotes natural oral and jaw growth. The Natural Wave teat from Lansinoh has been clinically proved to promote this natural feeding pattern.