Spices. Oh, and of course a little knowledge of how to use them to advantage.
They can turn the bland gleanings from a rural 7-11 into an appealing, tasty meal. They pack very small and very light. They aren't fussy about travel or storage conditions. They're a reason the Dutch risk life and fortune to sail around the African Cape in tiny wooden ships 400 years ago. It's the reason Paul Muad'Dib went to Arrakis.
Hmm. What else? Label anything you repackage.
I reckon I read that in maybe 75 or beforeish when quite young, and still remember being transported into that utterly fascinating world he created.
Fascinating to see its lasting influence even now in The Mandalorian, 55 years on.