This set contains: A Naturnah bottle with a teat with 2 holes (approximately after the first month), including cover and description. The Naturnah bottle Avent is towards the center more streamlined and easy to grip very well thus. Sticking the bottle through the round notches, especially for small hands even more enjoyable. The bottle is very light, so that it is well to keep self-employed (for elderly) babies. The sucker can not indeed use as easy as with bottles from other manufacturers, but it is completely leak-proof. The vacuum cleaner remembers its shape immediately to a nipple. A small slit at the edge prevents the emergence of bubbles, thereby reducing colic. Comparing the Naturnah bottle with the conventional Avent bottles is immediately noticeable that the sucker runs broad downward. So the baby has a larger contact area for the mouth and face. Similar to the mother's breast also here the material is very soft and pliable. What I personally like that in this bottle no adapter ring is present which can easily be lost. This bottle is also kompertibel not all Avent products. The breast pump Avent can, however, unscrew the bottle. Otherwise, the bottle is slightly larger than the regular Aventflasche with 260ml. Personally, I can only recommend this baby bottle.