Abstract: A backpack for dispensing a semi-frozen material comprising discrete granules by gravity flow comprising; a) an insulated hopper for storage of the material before it is dispensed which includes in its operative position i) a housing for receiving the granular material and ii) a funnel disposed to receive the granular material from the housing under the action of gravity; b) mounting means for mounting the hopper on a person in said operative position; c) an insulated valve operative to control release of the granular material from an opening in the funnel; d) an elongate flexible feed tube having in operative connection with the funnel opening such that when the valve allows release of the granular material form the opening, the material falls under gravity into the feed tube, and e) an outlet port at end of the feed tube and configured to allow directed dispensing of the granular material.