I had to use these mini glass jars with lids for baby. This idea of acquiring them raised after several frustrations I was getting from the little plastic bags normally used for breastfeeding babies that was always leaking and I could not warm-up the milk after freezing it without the fear of seeing the container completely soft.
I then discovered that just similar to me a family was looking for a glass product for feeding their children trying store the breast milk in a freezer without leaking and eliminate the plastics. And, they did it right. They were able to make a bottle nipple that fits a jelly eight-ounce or four-ounce mason bottle. This product did not only eliminate the plastics but it also saved them money and minimized the incidence of bisphenol A (BPA) found in many polycarbonate plastics used for storing food and water.
After consistent success of using these mini glass jars with lids, this lovely family decided to started the business of selling that very useful product for breastfeeding baby. The family has focused on using the mason jar and turned it into a healthy baby bottle.
If you are minimalistic and don’t want many things laying around like me you would only get two kits (the 8-ounce and the 4-ounce one). You can use the missiles with a four-ounce jar when my baby is an infant and the 8-ounce jars when your baby needs to eat more. I don't really need a silicone sleeve myself personally on a 4-ounce jar but I could see myself using an 8-ounce one especially if the baby starts feeding themselves.
There is an adult kit that comes with two slow flow silicone nipples one silicone sleeve and one cap. You can also decide to buy things separately. But buying the entire kit would be less time consuming and prevent you from the stress of trying to figure out how to connect these things.
As you can see the kit solves so many problems. You can freeze the milk in the jars, and when you're ready to use the milk take a jar out and drop it in a warm water without it leaking and then screw on a bottle nipple and you're good to go.
I have never had any concern with these bottles. They never got gassy, and our baby has always enjoyed using it. So, drinking from it was really a very natural transition from plastic breast to glass bottle. I personally absolutely loved the fact that, without hurting your wallet, it reduces the constant contact with the bisphenol A (BPA) that are claimed as being an intense destroyer of our body. So, WHY WOLDN’T I SAVE MY BABY’S LIFE especially now that his cells are significantly week?
Since I cannot rave enough about it I put the above link for you to check out more features of the product on the amazon.