A pack insertion device for use with a cavity in the human body, such as a nose cavity, is provided that includes an introducer member and a liquid absorption assembly. The introducer member is preferably one piece that can have a body member with side walls that form a rectangular cross-section. Alternatively, the introducer member is a single unit that includes a main body section and a pivotal body section that holds the liquid absorption assembly when positioned for insertion into a nasal or sinus cavity. In this embodiment, the introducer member has side walls that have cut-out portions, an intermediate wall that functions as a floor, and an elongated opening opposite the intermediate wall. In yet a further embodiment, the introducer member includes a single body having tapered side walls, an intermediate wall and an elongated opening opposite the intermediate wall. The liquid absorption assembly includes an absorbent member having a rectangular cross-section. The absorbent member further includes aproximal end, a distal end and a terminating section that optionally includes a cuff containing a marker to detect the location of the absorbent member when positioned in a nose cavity. The absorbent member is expelled into the nasal or sinus cavity by pulling the string member, while withdrawing the introducer member from the nasal opening.