Review on Maymom 15Mm Flange Insert Compatible With Elvie Single/Double Electric, Elvie Stride Cup (24Mm), Compatible With Medela PersonalFit Flex Shield, Not Original Elvie Replacement Pump Parts by Daniel Reeder

So it works fine. Doesn't affect suction either way, very easy to clean, have no idea about the price value can't remember price. It's a smidge difficult to get them in all the way and properly, but no biggie. The only complaint I have which is mentioned somewhere is the material. It can make it pretty painful unless you use coconut oil like it suggests. Do NOT try it with lanolin balm. It's great as long as you try it with the oil based from my personal experience.