I honestly do not see how you guys are coming up with flavors by doing drops. I guess if you do it long enough there is a method to madness. Due to the viscosity of juices, drops are not equal.
This is what I have tested in the past.
34 drops of water equal about 1ml
31 drops of VG equal about 1ml
50 drops of PG equal about 1ml
Wow!! That's a lot of drops per mil.... Are those drops from a syringe with a needle? I do have some experience in DIY. I Drop flavoring directly from the bottle it comes in except Loranns which I use a pipett. Most flavorings are artificial and PG so the drop, it's pretty accurate. I have tested this myself. Try it........ dripping into a syringe or graduated cylinder. The average 20 to 22 drops equal 1 mil. See ejuice me up calculator or DIY calculator,depending on the base and tool you use, the drops will vary. I had just dripped 10 drops of distilled water into a graduated cylinder that equaled 1mil.. then I dripped 21 dropps of vg/distilled water that equaled 1 mil & 20 drops of 50/50pg/vg that equaled 1 mil.....Also note that I'm using a dropper bottle and pipetts,....not a syringe It's definatly a method of maddness....LOL!