Flattens breast milk bags in the freezer for easy stacking similar to others available for purchase online. Slide the bag in from any opening (slotted side is easiest) and remove the bag once it's fully frozen from the open top or bottom end. The frozen bags should then stack better in any orientation.

Recommended printer settings:

Layer height: 0.2 mm Wall line count: 3 Top/bottom layers count : 3 Infill density: 35%

I used PLA, but this could be printed in any filament, preferably one with better moisture resistance. Print in the orientation such that one of the "open" ends lies on the print bed. This makes it so no supports are needed

Breast Milk Bag Flattener © 2025 by Evan Sneath is licensed under Attribution-NonCommercial-ShareAlike 4.0 International.

OnShape model