The BIOFUNCTIONAL bottle that ?feels? and adapts to the sucking rhythm of each baby.Feeding needs, as well as the rhythm and intensity of sucking, are different for each baby. They can?even vary throughout the day. Each shot is unique.The feeding requirements and the rhythm and intensity of sucking are unique to every baby, and vary at different times of day. As such, EVERY FEED IS UNIQUE. The BIOFUNCTIONAL anti-colic feeding bottle by Chicco is designed to WORK IN HARMONY WITH NATURE.WHAT DOES BIOFUNCTIONAL MEAN?Perfect 5 senses the needs of each baby, adapting IMMEDIATELY AND CONTINUOUSLY TO HIS OR HER PHYSIOLOGICAL SUCKING RHYTHM, delivering a PROVEN ANTI-COLIC EFFECT as well as ensuring MAXIMUM WELL-BEING during and after feeding.PERFECT LATCHThe teat adapts perfectly to the mouth of the baby and respects the natural sucking movement. Accepted by 9 out of 10 babies. 98% acceptance in the target age of 0-2 months.THE PHYSIO TEATAccepted by 98% of babies.* The pre-shaped, symmetrical, flat and elongated shape of the silicone encourages a correct latch and the peristaltic movement of the tongue. Soft silicone with a Soft Sense finish for a pleasant feeding sensation. 4 different flows available (slow, medium, fast and baby food) to follow baby’s development.