In my BoB:

I carry a US Army messkit with: metal spoon, Triox tabs, kitchen matches, and SOS pads.

I carry Bic lighters, assorted dry foods that need hot water (instant grits, Raman noodles, etc). Salt, pepper, and sugar packets (always); Ketchup and taco sauce packets (most of the time), and 4 MRE's.

My EDC includes a Buck 110 knife.

I routinely carry 10 days of rations and enough water purification tablets for 24 quarts/water.