Dr. Brown's Natural Flow Bottles are by far the best bottles that we have ever used. They discourage colic and ear infections while preserving vitamins and lipids (which your baby needs!). That’s a whole lot of use from a baby bottle, which is why we use them exclusively in our household.
Some parents find the bottles difficult to clean though, and they want to know whether or not Dr. Brown’s baby bottles can be cleaned in the dishwasher. This is a reasonable question; some bottles are only supposed to be hand washed.