When my 2 year old was an infant, I couldn't find a bottle that she would take.  One of my friend's recommended Soothie.  I tried it, my daughter loved it.  The only problem is that when she got bigger, she pushed the nipple into the bottle and spilled milk everywhere.

 I now have an 8 month old, I also bought soothie bottles for her.  I got the slim ones which are smaller and easier for the infant to hold.  The only problem that I found with these, is that the flow of the nipple is faster and the nipples are softer (so they would collapse).