Giving a WWII ration a try
Steve1989MRE goes to town on the classic Royal Australian Army 24-Hour o2 Ration pack, dated April 1945. Interestingly, it is marked that it can be “buried or submerged” which points to the extensive use of special operations forces such as Z Force and the Coastwatchers, groups that often worked behind Japanese lines across the South Pacific and needed caches for future use.
However, it wasn’t designed for an 80-year cache!
More on the pack:
“First tested in December 1942, the 02 was quickly adopted and was well received by troops in places like New Guinea. This ration could feed a soldier for up to 48 hours in a pinch. It was not only well balanced and nutritious, it was actually enjoyable to troops. One of the first 24 hour rations ever made, this is a very rare look into a historical item never before filmed. “