I've been using Dr. Brown's bottles for my dd and she's used to the stage 1 teat. When I've switched to stage 2, she kind of chokes, so she's not ready for that. Seems the Avent stage 1 also give her problems- a bit too fast of flow. Well, Dr. Brown's bottles leak all over the place and I'd love to find a different kind that do not leak. Has anyone had success with any of the other brands that they like? Would really like to get a rec. before I buy b/c they can be expensive. Thx!