This set of 2 bottles is a marvel of techonologie. Yes I know is bizare to say that a bottle but trying is believing. The bottle fits perfectly in the hand thanks to its ergonomic shape. The main advantage of this is the bottle teat is designed to look within. The texture and shape will be greatly closer. The nipple of alveoli and is deep can (compared to a regular pacifier) as the nipple. This system is really perfect for a nursery bottle-feeding (or simply to alternate 2). The anti-colic valves seem to effect because there is much less regurgitation and colic.
I think it is very good value for money. These bottles are very good and stand out from their competitors