Thanks, Science: Yet Another Reason Storing Milk in Glass is Better Than Plastic


During Mason Bottle’s Kickstarter campaign, we got some great press and that press generated a lot of discussion about bottles and feeding. So for the next several blog posts, we’d like to respond to some of the milk myths and mysteries parents have been wondering about.    
First up: Has anyone ever heard the suggestion that you shouldn’t use glass bottles with breast milk? We had not. (And don’t worry, it’s not true.) But apparently, until this idea was debunked by further research, this was a real recommendation people used to make. Amazing, isn’t it?
Here’s how this topic came up and here’s the science:
Among the 1/2 million views Mason Bottle's article in Popsugar received, one mom commented, “I thought you couldn’t use glass bottles with breastmilk.” Of course, we had no idea this was debateable, but then another mom chimed in: “You’re not supposed to because antibodies and/or nutrients cling to the glass. It’s been a long time since I was breastfeeding, but they did used to say not to put breast milk in glass.” 
Well, here's the science: It turns out that there was a study that came out many years ago that showed beneficial antibodies called leukocytes clung to the sides of glass containers. However, subsequent research has shown that breast milk stored in glass actually contains more antibodies than breast milk stored in plastic.  
Without further research, it is unclear exactly why breast milk stored in glass containers contains more antibodies. But whatever the reason, we are thankful to know that glass is actually better for storing breast milk that plastic!
We are also thankful for the wonders of social media, without which we would never have known that this might be a concern for some parents. If you want to know more about this topic, visit Ask Dr. Sears for the long version and for lots of other best practices when it comes to taking care of breast milk.

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@faustisland just bought a pack of Mason Bottle Silicone Nipples, and then combined one with a classic blue mason jar she had at home. Extra adorable!

@valeryphalon.photography uses Mason Bottle Silicone Sleeves to make toddler training cups for her big girls.

@headygrimm gets a Mason Bottle + Silicone Sleeve ready for her little one. She got the whole bottle including the jar as part of the Essential Mason Bottle Gift Set, but you can also make your own with jars from home using the Mason Bottle DIY Kit.

@loveandcovenant uses the 8 oz DIY Kit in combination with their mason jars from home.

@eyecreate_ gave her little lade The Original Mason Bottle. The width of mason jars makes them easy to hold for little hands.

@headygrimm got the Essential Mason Bottle Gift Set for her little one. It comes with both size bottles, both sleeves, and set of extra set of Medium Flow Nipples.

Paola used Mason Bottle with her son Max from the day they brought him home from the NICU. Though he didn't take to the preemie nipples in the hospital, he latched onto his Mason Bottle immediately!

@sriesland stocked up on mason jars for pumping at work, then she got a Mason Bottle DIY Kit to turn those jars into baby bottles.

@MasonBottle we like to use our 4 oz. sleeves with baby food portions.





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"I wish I knew about these before I had my shower, and avoiding all the plastic bottles I ended up with. They will also make great glasses after bottle use is over. Also happy to see the Made in the USA mark on the product as well." -Cathryn

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"The next best thing to breastfeeding and the world's best shower gift! I love that I will never again have to buy a baby bottle because I already have tons of mason jars and they are so easy to clean. Our little guy loves his bottle!" -Susan

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"The nipples are very wide, like on an actual breast, and our daughter really liked them. Early on, she would suck really hard on the other nipples and make a very strange noise. As soon as we changed over to these her feeding became effortless." -Denielle




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