I've seen a useful tool on some food processors before, where they have a small hole in the feeder tube that is perfect for making mayonnaise. If you fill the feeder tube with oil, the oil will fall through the hole one drop at a time, taking all the difficulty out of starting the emulsion by hand. I had a couple questions regarding this tool:
What is the right terminology for it? I always think of it as an "eyelet dropper" but I have no idea if that's an accurate term.
Is there anything special about the hole's construction that slows the oil to a single drop at a time? Or is it something about the viscosity of the oil that does it?
I enjoy making homemade mayo, but doing it with my blender is a real pain and I'd prefer to not have to upgrade to a larger food processor to automate starting the emulsion. I was hoping to just 3D Print a plug for my blender's lid that would include one of these holes, but I figured I'd ask first and see if the hole needed some special properties to work the same way...