How can you make a puppy drink from the bottle?

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I have a 4 week old puppy, and she wont feed from the bottle. She refuses the nipple. And she will on lap it from the palm of my hand. Should I try another nipple or is there anything I can try to get her to take it. She just turns her head away from the nipple. Even when I put it in her mouth and squeeze out some milk so that she knows what it is. She is just a tiny little thing. She is old enough to start on moist food? My vet suggested Gerber Baby food with the puppy formula.