What is the best recommended brand of feeding bottles?

I always used the Playtex Drop-Ins system for my children. First reason that I used these was that the bottles had liners that were designed for one use only so I didn't have to worry about cleaning that part of the bottle that is typically hard to get into with every feeding. The second reason that I really liked these is that I could squeeze all of the air out of the bottle so I wouldn't have to worry about the kids ingesting a lot of air and getting a tummy ache or gas because of their feedings.