Mila's Keeper Glass Breast Milk Storage Bottles come in two (2) sizes, standard and wide neck, to accommodate different size pumps and nipples.  Make sure you know which neck size is the right storage bottle for you. For example:

Standard neck: Compatible with Medela Breast Pumps and Evenflo Nipples.

Wide neck: Compatible with Spectra, Pumpables, and Motif Breast Pumps; and Pigeon and Avent Nipples. 

The wide mouth of this size also accommodates milk poured from wearable, hands-free breast pumps such as Willow, Freemie, MomCozy, Elvie, and Babyation.

 Volume: 5 ounces | 150 ml

Weight: Standard: 6.2 oz; Wide: 6.8 oz

Dimensions

Size and dimensions for Glass Breast Milk Storage Bottles

 

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