You know, I am really not sure of using a beaker as I've never tried that and I don't know if it is a good or bad thing.
I've heard some people try to spoon the formula into the baby. Perhaps that is where you should start if baby doesn't want to take the bottle.
Breast milk and formula are different tastes and your baby is smart enough to know it. I tried many different formulas on my first baby. Finally, it was the liquid, not the powder, formula that she settled on. Yes, of course, the more expensive one. ROFL
Be persistent and each day try her again...one day she'll surprise you
