Our bottles are equipped with truly innovative vents that are smartly designed to prevent colic, while completely eliminating annoying leaks.;A soft, squeezable bottle features a silicone nipple that mimics breastfeeding and eases breast-to-bottle transitioning.;The wide-neck design makes for easy dishwasher cleaning.;250ml/8oz bottles come with medium flow nipples (2 hole) ideal for 3-6 months.;100% BPA-free medical grade silicone; dishwasher safe.