A baby bottle device (100) is provided which comprises a teat (110) having a teat volume (115), a container (120) having a container volume (125) and a partitioning element (300) between the teat volume (110) and the container volume (125). The partitioning element (300) comprises a plurality of openings (310) for letting fluid in the container volume (125) flow into the teat volume (115). The baby bottle device comprises a floater (400) having a buoyancy, being coupled to the partitioning element (300) and being adapted to close at least one of the plurality of openings (310) in the partitioning element (300).
