MaymomWide-Mouth Milk Storage Collection Bottle with SureSeal Sealing Disk; Compatible with Spectra/Motif Luna/Ameda MYA/Bellababy Pumps. Can Replace Spectra S1 S2 Bottles, 6 pc (4.7Oz/140mL, 6pc)

I bought these to go with my Spectra S1 since the pump only came with one set of bottles to use. These fit the flanges perfectly and they hold a little more than 5oz if needed. I have not had any issues with leaking and they seem to hold up well on the go. My only complaint is that I used pen on the lid to label the date and it did not come off clean as the description says. I just use them to pump and then pour into bags anyways but that feature was misleading. Otherwise they were a great price and a great option for additional bottles for my pump.

** Works with Baby Buddha breast pump **I bought this so I could have extra milk bottles for my Baby Buddha breast pump for work. Comes with six bottles that all have lids. They are easy to clean, are plastic, hold 4.7 oz, leak proof, and super durable. I've been using them now for 3 months and have no issues. I'm sure you can freeze the bottle but I haven't done that so can't say anything about it. I would buy these again for the simplicity and durability.

These are good bottles. They fit onto the spectra pump perfectly. The lids are easy to put together and clean. The measurements on the bottle are easy to read. Most bottles only have every 10 milliliters but this one has every 5 milliliters.

I love these! I plan to use them to transport pumped milk home from work but at the moment I am using them to store pumped milk in the fridge before dividing and freezing. I love the silicone in the lid - it creates an awesome seal but is also super easy to pop out and in for cleaning. A standard bottle brush fits these bottles well so they're a easy to clean. They are marked to hold 4.7 oz but you could really fit 5 oz in each if you don't need to see the exact measurements. They fit my Spectra S1 flanges directly and also standard wide mouth bottle lids/nipples (I've tried both Avent Natural and Nanobebe with success). No issues sterilizing or heating in a bottle warmer.

These are great, I like them a lot better than the Spectra bottles.Markings are clear and easy to read (unlike the clear markings on the Spectra bottles) and they seal well and attach to the flanges without any issue. They also include a little silicone ring that you can use if they are loose.My favorite part is the caps you can write on, it works great with a regular ball point pen and comes off with just a quick scrub with the scrubby side of a sponge. So convenient and easy, much better than using scotch tape like I was with the spectra bottles.If there was one thing I'd change, I wish it had markings on two sides so you can more easily see how much you have as you're pumping. It seems like the markings are always facing my body as I pump so I can't see them without pausing pumping.

So I bought these bottles because I was exclusively pumping for the first several months of my daughter's life and I needed extra bottles to connect to the pump, store, and cut down on dishes. These worked great! They are a good price, easy to wash, great for storing. The only issue that I had is the inaccurate measurements.I was underproducing so every little fraction of an ounce was important to me (for accuracy of feedings as well as keeping track of production). The 1 and 2oz markings are wrong. If you pour 1oz into these bottles, it measures around 1.25oz. Same with 2oz. But once you get to 4oz it is accurate. I'm not sure how this got missed, maybe it's just the bottles that I got specifically but it was annoying and a pretty easy fix for the manufacturer. Also, the option to write on the lid is great, but just know that if you heat the bottles before you wipe the pen off, it will permanently stain.Hope this helps!

A must for pumping mamas

Honestly, it's impressive that Maymom has built a small empire by creating pump parts that exceed the quality of the original parts. Not only do they make a wide range of flange sizes (SUPER important for pumping) and quality parts at a fraction of the price of the name brand, they actually improve upon the original parts.These bottles are superior to the Spectra bottles I have for two reasons. One, they HAVE MEASUREMENTS. It's so annoying to weigh my bottles on a kitchen scale because the Spectra bottles don't have measurement lines. Thank goodness these have markings to the quarter ounce!! And two, Maymom included two O-rings. Just a few days before my Maymom bottles arrived, I had a bottle drop from my Spectra mid-pump which resulted in a small breakdown with lots and lots of tears. I opened this box of bottles and saw a small bag at the bottom with the O-rings and a card explaining that this is not uncommon with Spectra parts since they don't always lock tight together, and the O-rings will help to prevent bottles falling. I was SO excited! Of course, now I'm using my Maymom flanges with my Maymom bottles, so I haven't had that issue because they lock perfectly together. But if I use the Spectra or Avent bottles again, I'll be using the O-rings for sure!