I just needed extra bottles to use while pumping and these would fit my hygeia fit pro pump. I hate how small the opening is because the bottle washing brush barely fits and takes off all the soap.I’ve had several different milk storage containers before and these are by far the best i’ve ever used! The thing I love most about these is the slick design and shape. By these not having any divots or grooves in them they help keep the fat parts of my milk from clinging to them. I am able to save all parts of my milk for my baby! The amount I can save is also nice… they hold about 5 ounces easily.Easy to clean, I put them in the dishwasher. Durable and I have never had a problem with leaking. I would buy againThese are my go to breast milk storage containers. The thickness of the plastic is durable and holds up well to multiple washes in a week. Would definitely recommend.These are exactly what I was looking for. I’m able to store my milk in the fridge that I collect. I like that I can screw these onto my Medela Harmony pump. It’s nice to know how many ounces I am collecting cumulatively.I had no idea what I was doing Breastfeeding and didn’t know I needed a lot of these bottles. They came fast and helped a lot.Great bottles, I pair it with a bottle soap and it cleans well.I bought these to have extra containers for pumping and storage. They're not the most high quality materials and construction, but they do the job.Perfect for storing additional expressed milk.Very poor quality. They did not withstand steralization. They became soft. I compared these with the bottle which came with Harmony pump. These bend inwards when pressed even with slightest of pressure. The box which came looked really old. These bottles were manufactured in Jan 2017. I had ordered in Nov 2018. These bottles also looked old and dusty. I have 150ml medela bottles which come in 3 numbers. They are really good. I ordered these thinking I am going to save money buying in bulk but alas it was waste. DO NOT BUY THESE.The bottles which I received doesn't seem like original medela bottles. Compared with original medela bottle which came with the breast pump these bottles are of inferior quality. Even the packing is also not good. I'm worried whether these bottles tolerate boiling or not.No hay mucho que decir de esta marca, mi esposa tenía un saca leche manual de otra marca y compramos el eléctrico de esta, y es una maravilla a decir de ella y este paquete es el kit perfecto para poder hacer tu banco de leche no duden en buscar esta marcaOnly 4 stars because compared to my store bought medela brand these feel a little soft. My store bought are very strong and cannot be squeezed these however can. After sterilising a couple of bottles had their measurements fade a little. Still great little storage bottles though!