Okay, so I finally caved and bought these replacement parts for my Momcozy S12 Pro after dropping one of the original collector cups (mom brain is real y'all). And WOW - these are literally identical to the OEM parts!

The 24mm flange fits perfectly and that single-seal design? Game changer. I swear I get like 0.5oz more per session now. The BPA-free material gives me peace of mind, though I do wish they included those little storage caps like the original set had.

Pro tip: Having a backup set means I'm not constantly washing parts at 3AM (we've all been there). Just pop these clean ones on and keep pumping. They're super easy to clean too - just toss them in my sterilizer with my bottles.

Only tiny complaint? The valve seems slightly less durable than the original, but for the price difference, I'll take it! Definitely stocking up on these before my next work trip.