is the unimom double breast pump, compatible with any other brand feeding bottles? or even use a converter so that you can use any other bottles?

Hi Jenna, Thank you for your enquiry, the Unimom bottles do have a smaller neck so it can be difficult to use other bottles as you may not get a good seal, we suggest possibly pumping then moving it to another bottle? We hope this helps. ?For further information on this or any of our other products available, if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.