Firmly compress opposite faces of the cube to exhaust air and collapse its volumetric structure as much as possible, generously lubricate its flat surfaces, and direct it straight back into the vagina toward the sacrum high into the apex. Releasing your grip allows the medical-grade silicone to expand flush against the vaginal walls, creating localized suction across its six concave faces to structurally hold a severe prolapse upward; remind patients that this suction must be broken manually by hooking a finger beside a cube face before pulling the retrieval string.