Breast pump question
I have the Medela freestyle pump and in style advanced pump. I have tubes for each but it came with these extra tubes with this circular thing on the end with a rubber covering.. what is this supposed to be used for?
![](https://asset-cf-cdn.glowing.com/forum/topic/a1899b5e8a17ca2ef61a2b4ed19a9391.jpg)
![](https://asset-cf-cdn.glowing.com/forum/topic/43af77912e8736c1a670a03e5fda60d5.jpg)
![](https://asset-cf-cdn.glowing.com/forum/topic/d67f6aae88525791ec3e5fb8126efc1a.jpg)
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