I can not say enough WONDERFUL things about Dr. Browns bottles. I have 3 kids, one is 13, one is 10 and one is 8 months. My oldest child had colic, and terrible gas pains, I did not want to go through that again. So, when I got pregnant with the last one, I did a lot of research and decided on Dr. Browns. They do have several pieces, but they can be washed in the diswasher. And my philosophy is buy an excess of bottles, because in the event that you have a rough night, or day, or you are traveling, the last thing you want to think or worry about is "do I have clean bottles?" It's a little expensive at the front end, but I ended up going out and buying like 10 more because I got tired of washing them. Then, I bought the dishwasher containers for bottle pieces. And, I have never had a problem. Every once in a while I will double rinse the nipples if I think they need it.
But, I didn't breatfeed either, and I will tell you, my son has TRULY only spit up probably less than 10 times since he was born and he is 8 MONTHS. My middle child didn't have the gas pains or anything, but the air made him spit up a lot. I really think these bottles are a God send! They are worth the extra time, and take that from a mom who had a gassy fussy baby. It was terrible. GOOD LUCK!!