Divide it up during the day and put it in with water.  Suck it up into a syringe and give it that way.  Blowing gently on their face makes them swallow it whether they want to or not.  Evil as that may sound, that was how we did it until formula came into play and now we just put it in with the bottle.  I am with Tammy, though, in that we never were exact, just a few shakes here and there that were approximate.

God Bless,

Rebecca