Avent Baby bottles are claimed to be miracle-workers, literally, when it comes to gas in babies... They are of very good quality, look clean/pristine/modern, and you can wash them all you need, but continue looking good. The one thing about them: they didn't work for my Son. My Son was born a preemie @ 34 wks, and we know that some are born with acid reflux. My Son would literally vomit after every feeding, not only due to gas, but also to the fact that he could not keep anything down. I tried breastfeeding him but he just didn't like it, so I would pump, and pour my milk onto these bottles. They...