Help Me - Which bottles are best for preventing air bubbles.

diddlenation

My DD is just miserable taking a bottle.  She is breastfed but with me going back to work next week I have been pumping and feeding her with bottles to get her prepared.  She takes a few swallows and then wails like i have never heard.  We have to burp her and then she will take a few more swallows.  It takes over an hour to feed her 3 oz.  I have tried a variety of bottles but with my son we never had this problem so I don't know what is best for preventing air from getting into the bottles.  We always just used what we had with him.  

Please help me.  My heart breaks for my little girl with every feeding.