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)

So, I grabbed a pack of these Maymom 4.7oz bottles a while back, the 6-pack, because I needed something that would play nice with my Spectra pump. And honestly, they've been pretty decent, especially when I was just getting the hang of pumping. They screw right onto my Spectra flanges, no problem, which was a relief – didn't want to be fumbling around with adapters or anything.What I really appreciate is that the lids, these SureSeal things they call them, actually seal. Like, really well. I’ve had them tipped over in the fridge (thanks to my own clumsiness mostly) and no leaks, which is a win. I’d just pump, cap them, and into the cold they’d go. That 4.5-ounceish size is fine for me (small mom 4ft 10) I am not getting a ton of milk per session, so it feels like a good, manageable amount without wasting a giant bottle.Pros:They genuinely fit my Spectra. The box also says they work with Motif Luna, Ameda MYA, and Bellababy, so that’s handy to know.Those sealing disks are legit. No crying over spilled milk, literally.For starting out, six bottles felt like a good number to rotate through.Cons:The biggest thing is just the size. That 4.7oz (or 140mL, whatever) will fill up fast once my milk eventually comes in. I will have to look for bigger bottles down the road. So, if you’re already pumping a lot or expecting to, you might find yourself wanting to size up pretty soon.Bottom line? They are getting me through those initial pumping days without a hitch. They’re reliable for what they are, especially with the pump compatibility and the tight seals. Just know that for many folks, including me, they’re probably a stepping stone to larger capacity bottles down the road.

I started using these Avent Wide Neck Breastmilk Collection & Storage Bottles with my Spectra S2, and I couldn’t be happier with the choice. The 9oz size is perfect for my needs, and the Remarkable SureSeal Disc keeps everything secure without any leaks or mess.These bottles are super easy to use and clean, and they fit perfectly with my Spectra pump—no need for extra adapters or parts. The wide neck makes pouring milk into storage bags so much easier, and I love how sturdy they feel. It’s clear they’re designed with durability in mind.Pros:✔️ Fits seamlessly with Spectra S2 pump (no leaks!)✔️ 9oz size is perfect for collection and storage✔️ Easy to clean and doesn’t get cloudy with repeated use✔️ The SureSeal Disc keeps everything secure✔️ Works with Avent Classic Natural Bottle too for extra versatilityFinal Thoughts:If you’re using a Spectra pump and need reliable collection bottles, these are a must. They work perfectly, are easy to use, and make my pumping sessions smoother every time. Definitely my go-to for storage and collection now!

These bottles worked wonderful for pumping and feedings. They are leak proof and have a good capacity along with fitting well in diaper bags. You get exactly what you pay for worth the price!

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.

Very happy with these bottles. If you're looking at this you probably already know why you'd want larger bottles (you pump more than 5-6 oz per side at a time and overflow the bottles that came with your pump, and/or you single-pump and don't want to have to empty the bottle in between sides, etc.). These are great for those purposes. Fits the standard wide-mouth threading of, for example, the Spectra S2. Sometimes they don't lock on to the flange and I recommend a small piece of masking tape across flange to bottle to prevent the bottle twisting off when that happens (or for backup; I just do it all the time so I don't have to think about it). Not enough to ding a star for in my book.The volume markings are accurate and include 0.5 oz increments starting at 2 oz (also 10 mL increments starting at 60 ml). The markings are very persistent. There is no sign of any degradation in the printing after a couple weeks of daily washing. (Compare this to the collection bottles which came with my spectra pump; the ink came off completely within a week or two).The lids are great. They seal well. When assembled they function as one piece (unlike the fiddly plastic disk you use with many bottle rings), and they pop apart easily for cleaning. I haven't written on them.Update 4/9/17 (over a month later):I stopped using the tape as the bottles started locking securely to the flanges again (not sure why). The volume markings are still perfect after about two months of daily use/washing. Great purchase.Update 6/5/17Bottles still look new and no trouble with the bottles staying attached to the flanges in the past two months. 5 stars all the way!Update 6/19/19, with pictureI used these for almost 10 months, and while the marks did eventually degrade some, all were still readable. I’ve now used them another month or two. The markings are well-worn but mostly useable (see picture). Aside from that, the bottles are completely functional and I’m considering getting a second set.