search on the internet for some form of "this measurement to tthat measurement" calculator, and convert what you've got into something else, like teaspoons. i have some extremely tiny 1/4 tsps. that would probably work.
also, any kinf of cough medicine that comes with a cup on top usually has the dosages lined out on the side in milliters.
or, you could go to the drugstore and get an oral syringe. they are cheap, and lots of medicines come with them also, so you may already have one.
Just use a syringe and pin to draw it and measure. Since youre not injecting with that syringe/pin you can use the same one over and over again. Did you not try this, or is the stuff too concentrated to dose at the ml level? If its too concentrated then youll have to cut it down with more of the solvent.