A venturi-based wine aerator having a fluid passage that includes a throat portion for drawing air bubbles into the passing wine, the aerator including a plurality of differently sized air passages that lead to the throat portion of the fluid passage for producing air bubbles of a corresponding plurality of different sizes. Selective engagement of the seven shifting elements produces from the drive supplied by the drive shaft, via the three planetary gear sets, the seven rotatable shafts and the driven shaft, different reduction ratios for nine forward gears and one reverse gear. Embodiments may have the desirable combination of improved puncture toughness and ultimate tensile strength, low manufacturing cost and desirable optical and tactile properties. A penetration cap is provided that protrudes below the bottom end of the tubular body.