Portable Pipette-flask 30ml container (hinged & embedded magnets)

A portable, hinged container for storing two 30ml pipette oil bottles. The lid is held tight with embedded magnets.
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updated June 19, 2025

Description

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I needed a better portable option than just having the oil bottles in my jacket pocket. This is a simple hinged storage container modeled to the specific pipette bottles in the BOM. The precise measurements of mine can be found under "Good to know" below, in case you want to use different bottles. If you do, ensure they are ≤104mm tall and no more than 32.2mm in diameter.

As these oils need to be shaken before every use, I made sure to model the height of the cutouts as close to the height of the bottles as possible in order to prevent them rattling around.

Use a piece of filament as hinge. It's a tight fit, but that's intentional

Magnets

The hinge and container itself both have embedded magnets in them for a very secure, satisfying fit. In the .3mf file, I have added pauses in the print for when it's time to embed the magnets. There are two in both parts.

BE MINDFUL OF MAGNET ORIENTATION!

When printing the second part - whichever one it is - do yourself a favor and use the already printed part as a magnet direction guide. Go ahead, ask me how I know...
Just take two magnets, plop them on to the part, and use the part itself to align the magnets in the correct orientation.

It's a snug fit. Glue is unnecessary.

Print orientation choices

I decided to model this in a way that I could print it standing up even though it's bad practice to print a hinge like that. This is why the hinge is quite beefy. I have not experienced any issues however and could probably slim down the hinge ever so slightly if I needed to. If you wanna give that a go, the .step files should be easy enough to edit.

Good to know 

  • The flasks that I have, measure 32.2mm in diameter, including the label. They are 101.1mm tall.
  • The diameter of the cutouts in the printed container are 32.9mm, which means a satisfying air-friction fit in the container, and very little chance of slamming the flasks down by accident.
  • The cutouts were modeled at 33.2mm diameter, which means that my modeled-in clearance of .25mm is within 0.05mm for my printer. Your mileage may vary. I've printed mine on a Bambu P1S with a .4mm Diamondback Nozzle using a matte PLA.
  • The height of the cutouts is modeled at 104mm. Make sure your specific bottles do not exceed this.
  • Included among the files, is a cushion. This is intended to be printed out of TPU, and then superglued to the bottom, in case your bottles don't fit as perfectly as you'd like. You can adjust the height of these simple "pucks" in the slicer to fit your needs.
  • The magnets that I have used, are listed as being 2mm in height/thickness. They are not. They are 2.6mm. Hence why the BOM looks to not fit the measurements. Any magnet ≤2.6mm should be fine.
  • Print the .step files, NOT the STLs. They are only uploaded to enable 3D preview. In fact, as soon as there's a fillet or curve of any sort, best to use .step files.

BOM:

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The author marked this model as their own original creation.

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