Staple diet for the diet conscious squaddie. Can still be found in some ancient Rat Packs, but will have turned a nice Whitish colour. A unit of cadets/Officer Cadets can survive an entire exercise on a packet of Mars Bars.
Strange Northern types like to deep fry them. See: Deep Fried Mars Bars also known a Full Scottish Breakfast.
Additional uses: Door stops, window putty and Dildo (though this is considered messy and not to be used as such after having been Deep Fried, unless you truely are a monster!(Though I once knew a slop jockey that was into such things - shivers with the mental picture!))