A top open cage may include a first outer diameter at a bottom portion, a second outer diameter smaller than the first outer diameter at a middle portion, a third outer diameter smaller than the second outer diameter at a top portion, a chamber internal to the bottom portion and at least a portion of the middle portion, a first set of inlets from an outer surface of the middle portion to a middle section of the chamber, and a second set of inlets from an outer surface of the middle portion to the top end of the chamber. The chamber may be defined by a first inner diameter at a bottom end of the chamber and a second inner diameter smaller than the first inner diameter at a top end of the chamber.