... (2),Measure up to SGS and QS standard,mantain baby health. (3),Unique skidproof design for comfortable and ... 5),Wide nipple bottom ,natural feeding as breasts to baby. (6),The nipple has automatic air flowing hole to ... adjust the flow of milk and prevent the baby from sucking excessive air,reduce the phenomenon of ... and safe place to mantain the health of your baby. (2): Please don't spin the twist cap ...