A heating device for heat-sealing containers by heating an end forming portion 13 of a tubular container having a rectangular to square cross section, the end forming portion 13 having four generally quadrilateral first to fourth panels 21 to 24 continuous with one another and each having a heating region 31, 32, 33 or 34 to be heated on an inner surface thereof. In one example, the hopper includes a prefilter assembly which is coupled to an inlet of the filter box during a sweeping operation and which is removed away from the filter box during a hopper dump procedure. The capnic solution may also be sprayed onto mucous membranes such as the nose for relief of symptoms such as allergic rhinitis. At this time, there is no need to use another member and thus the two can be secured to each other without increasing the number of components. Alternate embodiments are shown which provide different shapes of cup and magnet and which provide differing attachments such as suction cups or belt clips for retaining the magnetic holder.