Vortex Mixer Extra Wide Top

I decided I wanted a vortex generator to mix my paints, but also didn't want to spend a lot of money. Fortunately this was already on Thingiverse: https://www.thingiverse.com/thing:3140367

The cone topper works great for mixing dropper bottles (cap-side down). But I have craft paints, Tamiya paints, washes and other larger bottles that also need quick mixing. I used calipers to take the dimension for the stem and built this extra wide mixer top.

I recommend test fitting this to the larger_bigger_coupler in the original files then use jb plastic to epoxy this topper to the coupler. That will help with issues of the stem breaking.

I had not used a vortex generator before this, so a couple observations: only press down as hard as you need to to keep the bottle in contact with the spinning parts. This is usually light pressure. Too much will create a lot of friction and can melt the dropper caps. Related, only squeeze the bottle as much as is needed to prevent it from spinning.