Nuk anti colic air systemthe orthodontic nuk shape combined with the nuk shape combined with the nuk first choice extra wide lip support makes it easier to breastfeed and to alternate between breast and bottle the nuk anti colic air system minimises the risk of infant colic caused by harmful swallowing of airnuk teats soothers are accredited by the british dental health foundationclinically tested supports breastfeeding bpa free