Hegen EU PCTO 150ml/5oz PPSU Bottle for Feeding Baby Teat Slow Flow Additional teats in different sizes (sold separately) allow mothers to simply switch over for their choice of pacifiers (Low/Medium/Fast/Thick) for the perfect baby feeding as time goes by. Milk storage lids (sold separately) allow feeding bottles to be converted into air and sealing storage containers easily by simply swapping the interchangeable lids. Growing with your baby, these storage containers can also be used as a snack cup or to store baby food, semi-solid, puree, biscuits, fruit juice or even! Product Features · Patented first thread no one-handed closure; the Hegen press to close, twist-to-open, EU PCTO innovation allows the bottle to be pressed on and twisted ideally for hassle-free handling and zero leaks. · Anti-colic features vents bypass milk to prevent aeration, minimize oxidation of valuable nutrients. This reduces excessive air intake and protects baby from stomach spills. · Super-soft silicone teat with an elliptical shape closely mimics the breasts of nursing mothers to simulate a natural interlocking experience, minimizing breast-teat confusion and making breast/bottle alternation easier. · Off-center allows feeding baby pacifier in an upright position, reducing the risk of milk return which can cause complications of the middle ear.