my field rations for 72 hr pack is a small pouch of rice, 6 energy bars and 2 of them 5 hr energy drinks and 1 canteen of water, weight is little over 2bls for 3 days. doesn't keep me full but will keep me going. i also have a small tin that weighs less then 3ozs that i keep a few bullion cubes and some fishing line with hooks small lures, snare line and water purifier tablets.