These chocolate-flavored emergency rations were among the supplies Charles Lindbergh and his wife, Anne Morrow Lindbergh, took on their 1933 survey flights across the North and South Atlantic. According to their label, each ration could "sustain a normal person for 24 hours." But it would have taken the Lindberghs much longer than that to reach the nearest outpost if they crashed in the North Atlantic or on the Greenland Ice Cap, a vast expanse of barren wilderness hundreds of miles wide. Accordingly, they brought several cans of emergency rations, plus a rubber boat and sled to carry them. The Lindberghs made it safely over the North Atlantic and Greenland Ice Cap, however, and never had to use the rations.