Are the Anti-colic bottles compatible with the rest of the Philips Avent products?
The Philips Avent Anti-colic bottles and nipples are interchangeable with the majority of the Philips Avent range.
AirFree vent and Anti-colic bottles
You can use the AirFree vent on any Anti-colic bottle, but not on the Natural bottles.
It is not recommended to use the AirFree vent with the Variflow nipple because the AirFree vent needs to be faced upwards to have a full nipple. This limits the Variflow functionality of being able to switch flows within a feed.
The Anti-colic screw ring and nipples do not fit on the insulated cup.