Such materials could be used to make hydrogen cartridges that would slot into fuel-cell cars, making refuelling as simple as pulling into a filling station and swapping an empty cartridge for a full one.
Apparently there was an air bubble somewhere in their fuel system that was turning this rather simple routine into an all-day affair of filling up and emptying out jerry cans.
The recipe called for a simple yellow cake to be split and filled with a whipped-cream filling stabilized with cornstarch and mixed with canned gooseberries.