The difference between the Philips Avent Natural Bottles to the Anti-Colic bottles lie in its design. See the difference here: https://philips.to/2yIxbUh | By Philips Avent | Facebook
The Best Baby Bottles (and Bottle Brush) | Reviews by Wirecutter
Sealed avent bottlemilk by Mackenzie Reeder from Kenzies Dolls on Reborns
Lot Of 3 Philips Avent Baby Bottles (2) 9 oz. (1) 4 oz. | eBay
Maymom Dome Caps Compatible with Avent Natural Bottles, Avent PP Bottles or Natural Glass Bottles; Not for Avent Classic Dome; Not Original Avent Replacement Parts - Yahoo Shopping