I have used the avent baby bottle with both of my kids. They were so picky about bottles when they were babies. It was the only one they really liked. I'm not sure why but I guess it was the only nipple they could get usded to and stick to it. They are made in England which says on the bottle. But they come in the 4 ounce sizes and the 9 ounce sizes too. We had to go through three different kinds of bottles until they really took the avent bottle. They do cost a lot more money then parent choice or other brands. All stores don't sell them either. I couldn't find them at walmart. But they are at...