Some things you keep handy just in case something unexpected happens. What if multiple friends show up unexpectedly for a spontaneous pool party at your house? You don’t want to break out the china, crystal, or silver. Just give them the tools to not look like a bunch of drunken Neanderthals squatting over the kill: Dixie cups, paper plates, napkins, and plastic flatware. Give them items that are useful, cheap, disposable, lightweight, and don’t take up much room.
That is a simple analogy for a short term, simple survival kit.
The Henry U.S. Survival kit is a good example of this. It is made by Best Glide ASE for many government agencies law enforcement and military. The items are good quality, made in the USA, and are U.S.Military and NATO approved. This kit contains almost every tool that will be useful when you dump your boat in the rapids or your pack mule runs away. The only items missing are food and water. The tools for getting and carrying these are in the kit.