We've had an issue since we picked up the baby from the baby home. Even before, actually.
My baby would not drink from a bottle, a sippy cup, a cup with a straw, or a regular cup. He's been drinking. Oh yea.
I've been using the plastic measuring syringe that comes with baby Mot*rin. 1.25mil at a time. 3 oz. would take me 45 minutes.
Today, like I do every other day, I gave him a sippy cup with juice in it (watered down, of course). Today he actually drank!!!
I was so excited, I called DH at work and told him.