https://www.amazon.com/DropperStop-Dropper-Bottles-Tapered-Droppers/dp/B073SHXGT5/

Use Propylene Glycol as solvent.
It will give ~30 drops/ml with these bottles.
When dissolving 7.5 mg/ml, it will be 4 drops/mg for dosing parts of a mg (often, I find 0.5 mg etizolam adequate)