These are the most amazing bottles ever...We started our daughter on Dr. Brown's bottles as soon as she came home from the hospital in June. Don't get me wrong - they're great bottles, but they're a nightmare to clean. We dealt with the hassle because they helped keep air out of her stomach and as a result she rarely threw up, and despite her being colicky (I was, so we anticipated that she would be also) we don't think the bottle contributed to it in any way.Then we wandered into a large Babies R Us two weeks ago and saw this new-ish Avent bottle... MIRACLE! I started by buying the newborn set at BRU (we had a gift card) just to see how they were. Our girl loved them, and so did we. One night after washing these beauties and we were sold.We ordered three of these sets and are in love. Our bottle washing time is cut in half and they're just as effective as the vented bottles, without the annoying extra parts to wash.I desperately wish we would have started with these since we have twenty Dr. Brown's bottles going unused, but I'm happily packing them up.These bottles are also amazing for travel and don't leak in the diaper bag (granted I didn't throw it in upside down, but I wasn't obsessively careful either). Seriously, try these... You owe it to your sanity!