These are great bottles but measurement wise they are not accurate, they are off by 5ML depending on bottle. Had to find this out the frustrating way and was under feeding my baby. Otherwise good quality.

Great product. Performs exactly as we needed and was at a reasonable price to add some collection bottles to the ones provided with our breast pump.

I am an exclusive pumper. I ordered these to save myself having to wash dishes after every pumping session. They were cheaper than the Spectra brand bottles and seemed like a good alternative. For they most part, they are. Two things that bother me: the volume markings are incorrect. The bottle will say I pumped 2 ounces, but when I transfer the milk to a storage bag and weigh it, it’s only 1.6-1.7 ounces. Also, transferring milk is a pain. The bottles don’t pour well and I end up losing milk…

These work perfectly with my Spectra! I bring these to work to pump into and store until I get home. They can go in the dishwasher, but need to put cover pieces in a basket. My only criticism is that I wish they were just a little larger, as they are only measured to 4.7 oz, whereas the cups that come with Spectra are marked to 5 oz and can hold almost 7 oz. The Maymom accessories are excellent quality though!

I'm a near-exclusive pumper, so I go through a lot of bottles. My pumps are the Spectra S2 (wide neck) and Medela Symphony (narrow neck) and I have a bunch of Avent bottles (wide neck), so the two things I need are (1) narrow-to-wideneck connectors, and (2) extra wide-neck collection containers.I've tried both the MayMom and the Matyz collection containers and connectors. The MayMom parts are a little more expensive but, IMO, worth the extra cost. These collectors fit my Spectra, Avent, and…

I needed bottles that would fit the Spectra flanges and could hold more for my morning pumps. These are great! They hold way more than what comes with the Spectra and store well in the refrigerator. I do not use them to feed my baby because we use DR Brown bottles for that.