Abstract: A vacuum including a suction inlet and a suction source. The vacuum also includes a dirt cup in fluid communication with the suction inlet and the suction source. The dirt cup includes a first stage cyclonic separator and a dirt collection chamber. A housing of the dirt cup includes a first end, a second end, and a neck region between the first end and the second end. The housing has an outer dimension that decreases in a direction from the first end toward the neck region and an outer dimension that decreases in a direction from the second end toward the neck region. The dirt cup includes a shroud within the housing, and the shroud includes a flange that divides the housing at the neck region. The dirt collection chamber and at least a portion of the shroud are between the second end of the housing and the flange.