One-piece Bottle Cap

These fit my Phillips agent natural glass bottles and spectra bottles. Have not noticed any leaks and keeps the milk fresh. Still work great after dishwasher

These tops fit the avent bottle perfectly. Seems to be good quality and seem to seal great!

My favorite bottle lids. I’ve used for 3 kids I’ve pumped for. I have to shake bottles and these are the only lids I have that never leak!

Works great, easy to clean. Fits well and works with the Philips Advent Natural glass bottles.

These are just right for my Avent natural flow bottles. Now I can take them anywhere.

4 stars because unfortunately there is still a bit of leakage when used with the Avent large-mouth bottles. The leakage can be avoided by doubling up the sealing rings, one clear one and one pink one, for the Avent bottles. The pink sealing rings work perfectly for the Spectra pump bottles. Overall a super useful product. Love having these for my Spectra pump, just didn't work as well as I would have hoped for the Avent bottles.

I got these to replace the lids on storage bottles I previously purchased that was growing mold under the silicone rings. With these, the silicone easily slides out for easy cleaning, fits perfectly on my bottles, and I can shake, flip and use and abuse these lids and nothing leaks. I have not written on the lids so I cannot speak to that, but overall I love these and would absolutely buy them again.

Perfect on my avent bottles and it does work on my spectra too