No anti-coliqe ring and ring of incompatible smaller versions

So far we used the bottles in the same range but smaller capacity without any problem, that model is a disaster.
It does not have the "anti-colic" ring yet feature in the range. The flow teat is not the same, even when using a so-called equivalent speeds.
After only 3 minutes with the new bottle: our daughter was taken to uncontrollable crying for 2 hours!
And obviously, the ring smaller bottles does not fit!