I have the original one 22 oz. I can fit my 4 Phillips Avent glass bottles (two) but with a different lid (won’t fit with nipple and ring). The spectra parts lid actually.
Following! Oh I love this! What about the narrow Dr browns 4 oz bottle in the 12 oz one? I’ve been on the fence back and forth trying to figure out which one would work better for me.
I know. I hope mamas that have these can help. I even asked AI before. It just says it’s a custom fit bottle. Ugh. I hope the 12 oz one can fit my bottles as I don’t need much, but it’s a huge chance it won’t. We use glass life factory with silicone covers. It’s the same size of medela and Dr browns bottles.
I just found this review it may help you and i will attach the dimensions of bottle inserts for 12 oz so you can compare with your preferred baby bottle!