Full Set Milk Collector Cup Compatible with Momcozy S12 Pro/S9 Pro Hands-Free Breast Pump Wearable,Upgrade Duckbill Valve for Original S9 Pro/S12 Pro Replacement Pump Parts(NOT for S9/S12),Flange 24mm

I got this as extra cups for my momcozy S12 and they work really well. They do not leak and setting up the cups is way faster than the cups that came with the breat pump. Just make sure you have extra nipple flanges or you will need to buy extra. These cups do not come with the nipple flanges so IT WILL LEAK if you try to use it without the flanges. I liked it so much I bought a second set of cups so my pump is always ready to use. It's one cup per order so you need to buy two if you want to use for both breasts at the same time.

Trash. These appear to be compatible with the momcozy s12pros but they aren’t a perfect fit making the suction non existent. I am an oversupplier and used these once and barely got 2 oz total. This isn’t saving money because you’re going to have to get the momcozy ones anyway since these don’t work.

Fits the s12 pro. Actually think it’s easier to put together than the original one

It feels a little more rigid than the actual cup/parts that came with my momcozy s9 pro but I have had successful pumps with it. It has been easier having a second set of cups/parts so I can rotate between the two and not have to rush to clean and dry right away. It’s also made it easier to be able to pump every 2-3 hours having a second set because my baby often dictates what I have time for and the cleaning and drying of just one set usually doesn’t happen. Now I don’t have to worry right away.

I think this product is great and works well! I was slightly hesitant with the reviews, but glad I decided to try it anyway. It fits my momcozy s12 pro, it is a little harder to snap on to the motor than the momcozy brand, but still works just as well and empties me the same, if not better! I haven’t had issues with leaks. You do have to press a little harder to ensure the top is snapped on well, but it’s really easy to see if it’s snapped on properly. Overall, does the job and saves you a couple bucks!

I have a momcozy S9, which its is supposedly compatible with. I purchased this so I can cycle in between cups and cut down my wash times. I'm paranoid and I always wash and sterilize in between uses. When I first used it, it was initially ok, but then I realized the difference between this and the momcozy brand collector cups that came with my pumps. The suction when using this is not as strong. The hole at the top where it connects does not sit flush against the pump motors. There's less efficiency due to this and less milk output.2nd problem is it leaks like crazy wheb i pour the milk. I've wasted sooo much of my precious milk because of this, it's not even funny. It doesn't just leak out of the piur hole, it leaks from the hole of the flange too even when I carefully invert it to pour.Just splurge a little but and buy the original Momcozy parts.

These parts for perfectly for replacement of momcozy s12 pro, the battery does latch on a little different but does not leak, and it feels less bulky in a way. I originally bought two sets to help with cleaning every pumping session and these are actually easier to clean!

My own fault - I'd meant to order OEM parts and in my sleep deprived haze accidentally ordered two of these milk collector sets instead of the Momcozy branded ones. I didn't realize until after I'd already washed and sanitized. Decided to give them a try anyway, and they were notable worse than the OEM ones. It was impossible to get a good seal (audible air leaking), and I got less than half of what I normally would pump in the same length of time.Would return for a full refund if I could.