Recently my wife showed me a few social media posts where moms were showing off their husbands 3D printing breast pump accessories and bottle holders, so naturally I offered to print her something for her! I found a design here on Printables that she used for a little while, but it had a carrying handle she wasn’t wild about. So I designed this bottle holder with my wife’s input and suggestions!

The inner diameter of the bottle holding parts is 65mm and fits our oval-shaped Spectra bottles and other miscellaneous round bottles great. It’s about 85mm tall as well, ending almost right where the pump attachment screws on to the bottle. 
 

Initially I designed this with completely smooth, flat sides, but as I watched my wife use it I noticed it didn’t look super comfortable to hold. So, I added an hourglass shape to the sides which provides a nice, natural space for your fingers to wrap around. It was also completely flat on the bottom so I added holes in case milk leaked, that way the holder can be easily rinsed out. 
Additional holes were made for aesthetics as well as being able to quickly see how much milk is in the bottles while they’re in the holder. 

This device works great for keeping your bottles upright in the fridge if they’re empty as well as full, and it’s nice to set somewhere nearby during active pumping! Just watch out for rogue toddlers…

Print settings:

Layer height: 0.2 works just fine, I used adaptive layer heights to smooth things out. 
 

Supports probably aren’t necessary but I used them. 
 

Infill: Not more than 15% should be needed, I like adaptive cubic. 

Print time sliced in Orca Slicer for my Ender V3 KE was under 3 hours, for reference.
 

Let me know if you have any suggestions for changes.
Happy printing and pumping!