Let me tell you, these 16mm flange inserts saved my pumping journey. After struggling with standard 24mm flanges that left me sore and frustrated, slipping these into my Momcozy M5 felt like magic—suddenly, it was *my* pump instead of some awkward contraption fighting against me.

The soft, food-grade silicone molds perfectly—no pinching or that ‘plastic tug’ feeling. I actually look forward to pumping sessions now (wild, right?). Washed them in boiling water after the first use, and they held their shape beautifully—no warping or weird smells like cheaper inserts I’ve tried.

Pro tip: If you’re between sizes like I was (17mm was too long), go for these. The snug fit boosted my output from pathetic dribbles to actual ounces per session. Saw results within DAYS.

Only gripe? Wish they included a nipple measuring card—had to use a printable one online. But for the price and instant comfort upgrade? 10/10 would repurchase mid-3AM pump session.