I've been using these Kiinde twist pouches for about a month. I have a Spectra 9, bought the adapters and pump directly into the bags.Pros:- I love that this system allows you to not need to pump into a bottle and then transfer into bags. This cuts down on cleaning bottles which is AWESOME.- I can also keep a box of the bags at work and won't need to commute with a couple of bottles everyday. All I have to bring are the flanges and pump.Cons:- I used to use Lansinoh storage bags and the Kiinde pouches take up much more space because of the twist cap. It's also harder to organize in my freezer because it can't freeze flat like the Lansinoh bags.- Its hard to really gauge how much milk is in the pouch and how much your baby is drinking. You have to make sure the bag is fully expanded. If it's not entirely expanded, it could mean the difference of mistaking it for a full ounce more than what you actually have.- Despite the fact that the pouches take up much more space in my freezer and the difficulty to measure milk accurately, I'm knocking off 2 stars because I've noticed debris inside a few new unused pouches. Out of a box of 40, I've thrown out about 5 pouches because of this. The first time, I noticed a couple of small pieces of what looked like card board. They were about 2mm wide and the only reason I noticed them was because they were brown and stood out in a bag of white milk. I was so annoyed that I had to throw out a whole bag of milk. From then on, I'd inspect the bags before using. They look clean for the most part and I'll throw out any that have specks of stuff in them, whatever they may be. I've seen white specks that I'm guessing might be tiny plastic pieces that is the same material as the bag. I've seen dark brown specks which I can't figure out what it is. I just question how sanitized these bags really are. I've never had this issue with the Lansinoh storage bags.Update: I'm adding two pictures of two different pouches with some sort of debris inside. In the first photo, you can obviously see a brownish substance. In the second photo, there's a small white speck that I've pointed to with the tip of a pen. While it's still small, I don't want my baby drinking this in with breast milk.UPDATE (8/1/16): Kiinde's customer service left me a comment to contact them. I did and they offered to send me a free box of twist pouches and noted that the box I received was a result of a rare instance of poor quality control from an older batch and assured me that their pouches are safe and sanitary. I thought this was a nice gesture and since I really want to make this work because it is a much more convenient concept for this working mom, I decided to keep using the pouches. I have an oversupply and have been building up my frozen milk stash so I'm in need of a lot of twist pouches. I've ordered 5 boxes of 80 since my last review. I check each and every pouch before I use them and unfortunately, I have had to throw out about 10 pouches per box because I've found brown specks inside. It might not bother some people but since I don't know what it is, I would rather throw it out than have my baby ingest it.The new pouches can hold 6oz and the bags are wider. The material also feels thicker and sturdier. However, the measurements on the bags are off. I tested this out by measuring 4oz of water in a bottle and then pouring it into the bag. With the bag fully stretched out, it measures 3oz. I took another step and verified this by weighing the bag on a food scale and it is indeed off. What I do now is weigh all my pouches before I freeze them and write down the correct amount on the bag next to the date.Additionally, the pouches are taking up A LOT of space in my freezer. I can't stack them as compactly as the Lansinoh milk bags. I'm at the point where I either need to buy a freezer chest, go back to using the Lansinoh milk bags or get rid of some of my frozen supply. I'm not willing to throw out any milk in case I ever get sick and lose my supply but I am seriously considering going back to using the Lansinoh storage bags. They are just much more easy to store. Read more

DISGUSTED!! I contacted Kiinde through email because several of my frozen bags of milk were leaking from the top where it wasn't properly glued together. They sent me 2 replacement boxes and stated they were better now because they switched a sanitizing process they had. Wrong!!!! I pumped directly into these after sanitizing my pump parts so everything was definitely clean, and this was floating in my babies bottle after half of it was already drank. A dead bug of some sort. We have ZERO bugs here in Michigan right now due to the freezing temps. Especially ones with WINGS!!! I am so disgusted. I really hope my baby doesn't get sick from this. I emailed the company a picture and description but last time it took about a week before I even heard from them. So we'll see if they even respond to this. Read more

I have been using these bags for about 2 months now and I have reccomended them to everyone I know. The ability to pump directly into the bags may seem minor, but those few minutes it saves is worth it. I also use the bottle system (which is awesome only having to wash a nipple), but I that is a separate review. You can purchase the adapters so you can use these with vertually any pump. They are a little pricey, but it is understandable since it isn’t like the cheaper zip-lock system.The only reason I gave these 4 instead of 5 stars is because it can be difficult to determine how many ounces are actually in the bags. For example, I could pump 4 ounces into your bag and when the bag is later warmed up, it then looks like there is 3 ounces in the bag. So is there 3 or 4 ounces?? Every time I heated a bag, the amount would drop by 1 ounce (so from 6 to 5, from 5 to 4, etc). I measured out the ounces separately and poured it into one of the bags to see how close the bags were to the correct ounces. If the bag is opened all the way, the ounces it shows PRIOR to being warmed up are actually pretty accurate. I took pictures to show the before and after for the bags being warmed up to show the difference (I used colored water, didn’t want to play around with breast milk and risk it going to waste!). So for those that are wondering, whatever you pump into the bag is the correct amount and after the bag is warmed up, it will appear to be about an ounce less than there actually is.PROSSecure-never leakConvenientEasy to useTime SaverNo wasted milkCONSA little expensiveStorage takes up more space than other bagsIf you are questioning getting these, just do it. You won’t regret it! This was my 5th baby and I wish I would’ve used them from the beginning. Breast feeding and pumping is time consuming and hard enough as it is. These bags (and the system) make it just that much easier. Read more

Update 8/27/16:I'm very upset to say that a few of the pouches I have received had black floating specks stuck the inside and on the edge of the opening. I poured expressed milk in the pictured package before noticing the specks and had to dump it down the drain. What in the world has gotten into these? They are supposed to be a sterile product!!I love these. Sanitary, easy, and convenient. My baby loves the kiinde nipples and I love the ease of use the product gives me. I'll be honest the measurement is kinda hard to get used to but I always pump into my plastic medela bottles first and use that measurement. Read more

Hay un kit de adaptadores de esta misma marca, para poder usar los extractores de cualquier marca directamente con las bolsitas, la primera ves las use con extractor evenflo, y esta ves con medela sin ningun problema, los recomiendo mucho Read more

El producto es lo que se anuncia. Aún no lo uso, pero no veo por qué no funcionaria para guardar la leche en el congelador o refri sin ocupar mucho espacio.Las bolsas no son reusable pero se pueden guardar y usar después para papilla o licuados (y eso planeo hacer).Lo malo fue el envío. La caja parecía que estaba abierta al llegar y las bolitas están nada más metidas sin acomodar. Pensé que era un producto devuelto y vuelto a vender. Sólo me tranquiliza que muchos reportan lo mismo. Supongo que así lo envía el fabricante (mala imagen!). Read more

Me gusta mucho este sistema , había dudado de comprarlo o no por miedo a los derrames y fugas pero realmente cumple su función, compré el adaptador para el extractor y se lo puse a mi medela freestyle , funciona bien . También las botellas que se adaptan han resultado bien, había comprado la tetina de medela calma y mi bebé no se adaptó , pero la tetina de las kiinde es más sencilla y resultó funcional y más económico (mucho más ). Si estás pensando hacer banco de leche o hacer tomas diferidas , esta es una gran opción . Read more

Yo lo uso para la comida de mi bebe y es lo mejor. Practico e higiénico. Lo caliento a baño María o con agua caliente lo sumerjo y en 5 minutos ya está todo tibio listo para comer Read more

Excelente calidad y material muy bueno , congeló la leche materna para mi bebé y al momento de calentarla no le pasa nada se mantiene muy bien 👍🏻👌🏻 Read more