Salt is a precious and portable commodity. Salt has long been a cornerstone of economies throughout history. Greek slave traders often bartered salt for slaves, giving rise to the expression that someone was “not worth his salt.” Roman legionnaires were paid with salt—salarium, the Latin origin of the word “salary.” It is a vital nutrient and is used to preserve meat. At less than $.40 a pound salt makes a great barter item to stock up on, especially if it goes back to its pre-modern prices.
The term "survival kit" may also refer to the larger, portable survival kits prepared by survivalists, called "bug-out bags" (BOBs), "Personal Emergency Relocation Kits" (PERKs) or "get out of Dodge" (GOOD) kits, which are packed into backpacks, or even duffel bags. These kits are designed specifically to be more easily carried by the individual in case alternate forms of transportation are unavailable or impossible to use.