Let me start by saying that I have a variety of Dr. Brown's bottles & these are by far the best. The standard necked bottles leak like crazy if you don't get them put together just right... The wide necked ones have the tan piece that actually snaps down into the neck of the bottle to prevent leaking... Buy these instead of the standard necked bottles!
Bought this two pack while I was pregnant. Planned to nurse my baby and wanted to find a bottle that wouldn't "confuse" her. But I also didn't want to spend a ton testing out different brands. My baby is now 5 weeks and is successfully taking one Dr. Brown's bottle each day, with no problems going back to nursing. Love them! I know people tend to complain about the extra pieces to clean but it really isn't a huge deal - can always toss them into the dishwasher if you want.