Pura's feeding systems are not only the safest in the world but our natural vent nipple was designed to mimic the variable flow rate of breast feeding. These nipples employ a new shape that promotes a better seal between the baby and the nipple, an elongated vent to reduce colic and spit-ups, and the use of multiple holes in the tip to achieve different flow rates.
Additional information: ~ One, two or three holes as well as a Y-cut version instead of varying the size of the suction hole ~Four flow rates — slow (0M+), medium (3M+), fast (6M+), and Y-cut (6M+)
~ Elongated vent helps reduce spit-ups and colic
~ 100% plastic free infant nipple crafted from medical grade silicone
~ Each pack contains two Natural Vent Nipples of the same flow rate
~ Meets all FDA, CPSC, EN14350, European Commission 10/2011, German LFGB regulations and/or guidelines