They have those bottles by NUK that is very similar to a mothers nipple so similar that my daughter won't use them! But when the baby sucks on it it's sprays like a mothers nipple would with multiple holes.

if you go online and do some research they actually make bottles to ween babies off of breast feeding!!

Have someone else give the bottle first. This helps. If they are resisting, make sure you are out of the room and have them try when the little one is not crying due to hunger. Try before that.