An assembly for selectively aerating a beverage, the assembly comprising: a base member having at least one surface that defines a reservoir adapted to receive the beverage, the base member extending along an assembly axis from a first end to a second end, the base member having at least one base aperture formed in the at least one surface defining the reservoir; a support member non-rotatably coupled to the base member, the support member having at least one support aperture disposed within a recess, the at least one support aperture in fluid communication with the reservoir of the base member; a diverter member rotatably coupled to the support member and rotatable between a first diverter position and a second diverter position, the diverter member having at least one primary aperture disposed within a trough portion, and at least one secondary aperture disposed at a first end of a channel portion; and an aerator member non-rotatably secured to the diverter member, the aerator member having a plurality of elongated flow features that each extend from a first end to a second end, the aeration member having an aeration aperture, wherein in the first diverter position, the at least one support aperture is aligned with the trough portion such that a portion of the beverage in the reservoir flows through the base aperture and into the recess of the support member and through the support aperture, into the trough portion, and through the primary aperture, and wherein the at least one primary aperture is aligned with or adjacent to a first end of the flow feature such that the portion of the beverage flowing through the primary aperture contacts at least a portion of the first end of the flow feature and flows through the aeration aperture, and wherein in the second diverter position, the at least one support aperture is aligned with a second end of the channel portion such that a portion of the beverage in the reservoir flows through the base aperture and into the recess of the support member and through the support aperture, into the channel portion at or adjacent to the second end, through the secondary aperture, and through the aeration aperture. a base member having at least one surface that defines a reservoir adapted to receive the beverage, the base member extending along an assembly axis from a first end to a second end, the base member having at least one base aperture formed in the at least one surface defining the reservoir; a support member non-rotatably coupled to the base member, the support member having at least one support aperture disposed within a recess, the at least one support aperture in fluid communication with the reservoir of the base member; a diverter member rotatably coupled to the support member and rotatable between a first diverter position and a second diverter position, the diverter member having at least one primary aperture disposed within a trough portion, and at least one secondary aperture disposed at a first end of a channel portion; and an aerator member non-rotatably secured to the diverter member, the aerator member having a plurality of elongated flow features that each extend from a first end to a second end, the aeration member having an aeration aperture, wherein in the first diverter position, the at least one support aperture is aligned with the trough portion such that a portion of the beverage in the reservoir flows through the base aperture and into the recess of the support member and through the support aperture, into the trough portion, and through the primary aperture, and wherein the at least one primary aperture is aligned with or adjacent to a first end of the flow feature such that the portion of the beverage flowing through the primary aperture contacts at least a portion of the first end of the flow feature and flows through the aeration aperture, and wherein in the second diverter position, the at least one support aperture is aligned with a second end of the channel portion such that a portion of the beverage in the reservoir flows through the base aperture and into the recess of the support member and through the support aperture, into the channel portion at or adjacent to the second end, through the secondary aperture, and through the aeration aperture.