I made this to suspend a pipette full of nicotine in the nicotine bottle while I am mixing juices. It's modular enough so that you can print/add additional parts you may find useful while mixing; the holes are designed to fit a 25mm M3 screw, or you can make snap-on parts (see the eye dropper holder for a reference).
Included is an optional eye dropper holder; since a lot of times I am just re-mixing the same juice in the same bottle, it's nice to have a spot to set the eye dropper so it doesn't get dirty.
The pipette holder head is press-fit. I printed this on a Lulzbot Mini with the eSun PLA profile had no problems, but YMMV.
Hope you enjoy!
Make sure to print the base upright and not on its back