Okay, so I was STRUGGLING with my Momcozy M5 until these little silicone saviors arrived. The 17mm inserts I had were awkwardly long, but these 16mm ones? *chef's kiss* Perfect fit!

The softness is unreal – like they melted into my pump setup. And can we talk about the price? Way cheaper than buying whole new flanges from the brand.

Pro tip though: MEASURE FIRST! I got lucky guessing my size, but they offer like 10 sizes (13-22mm). These particular ones worked magic on my BellaBaby pump too – apparently they're some kind of universal flange whisperers?

Washing is stupid easy – just toss 'em in boiling water or steam bags. Though heads up: they're thicker than original Momcozy inserts (which I actually prefer). Saw someone triple their milk output after switching – can't promise that miracle but dang, comfort matters!

Only wish? A measuring card included. But for how well these solved my pumping woes? 10/10 would flange again.