How to Pump Directly Into Mason Jars

Posted on April 15 2019

How to Pump Directly Into Mason Jars


How to Pump Directly Into Mason Jars

At Mason Bottle, we are constantly working to find ways to make life simpler and safer for your family.

In fact, what Mason Bottle families tell us they love most about using mason jars is that you are able to store, heat, and feed breast milk all from the same jar! In other words, you are saving a whole lot of time, money, breast milk, and energy. While transferring from pumping bottle to mason jar still beats the heck out of plastic storage baggies, being able to pump directly into the mason jar is ideal.

On top of making your life easier, you are promoting a healthy economy, environment, and most importantly a healthy life for your little one.

“Wow, Mason Bottle makes feeding healthy, affordable, and easy, but can you pump directly into a Mason Bottle?” you can!

Now that dream is a reality! We have found solutions for both the Spectra and Medela pumps. The Maymom adapter is compatible with both the S1 and S2 Spectra models. If you are using a Medela pump, the Nanobebe adapter can be used with a Medela pump.  

Say goodbye to the tedious days of transferring milk from pumping bottle to mason jar!


Information on Assembling the Adapter:

1. Set the Maymom pump adapter onto the regular mouth mason jar

2. Twist on the metal ring

3. After twisting the metal ring over the Maymom pump adapter, connect the adapter to the flange

All the S1 and S2 models use the same size parts, so any pump spectra makes is compatible with the Maymom adapter.


Check out the Spectra adapter on the Amazon product listing!


Check out the Medela adapter on the Amazon product listing!



  • Valeria : October 09, 2019

    Is there a way to adapt a mason bottle to a Lansinoh breast pump???

  • Adri: June 10, 2019

    The Medela adapter for Nanobébé bottles works with regular mouth mason jars! I just pumped twice today using them!

  • Kathleen W: July 08, 2019

    Wow, have been trying to find an adapter that would work. This works great with my Spectra S2 pump! Thank you so much!! :)

  • Jessica L Awe: April 25, 2019

    This makes me so happy! I am going back to work and pumping into plastic bottles felt like it went against the idea of using glass bottles. I am super excited to give this a try. Thank you posting this.

  • Stephanie: April 25, 2019

    How would this be possible with Medela sonata? This would be amazing, if possible!

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