MRE on the go, size per your program. A fruit, a carb, and a protein:

Put "cooked" ramen noodles (plain, toss the flavor pak), coupla slices of jerky, 1/2 c juicy frozen or dried fruit, in a Ziploc-type bag. Squeeze out all the air. Later, add hot tap water. Cut off a corner of the Ziploc, and suck it out like space food. (Rinse off the outside of the bag before opening.) Not bad!

~S~