Classic Feeding Bottles (2 Pack) Size: 4 oz Review Posted by PhantomSpike May 21, 2018 in Baby Bottles 857 Size: 4 oz Features: -Two piece anti-colic valve system.-BPA Free (0pct Bisphenol A).-Five different nipple flow rates.-Easy to assemble, easy to hold, wide neck. Baby Products Bottle-Feeding Feeding Philips AVENT