I exclusively breast fed my first three children but have gone back to work with my fourth. I was very stressed about introducing a bottle. He prefers the playtex nursers and I couldn't be happier with the ease of use. No scrubbing the milk from the inside of the bottle. Just take out the bag and pop in a new one. I was worried about leakage but have never had the problem. Highly recommend. Another plus, walmart and other discount stores sell generic bags which work just as well.
Playtex Drop-Ins Original Nurser Baby Bottle is recommended by bsaj