While traveling for work, I often saved money by packing a lunch to take to offices with me whenever possible. When really short on cash and in a hotel with complimentary breakfast, I've been known to snag a couple pieces of bread, single serve packets of peanut butter and jelly and a piece of fruit from the breakfast bar for my lunch. My insulated lunch bag kept things cold even when I didn't have access to a refrigerator, but it was a huge pain to pack since it doesn't flatten out. I later picked up a zippered neoprene lunch bag that I like much better and packs away easily.
An insulated lunch bag, a few sandwich and snack containers, plastic utensils, a measuring spoon from a breadmaker long gone and a plastic spork meant for canned kitty food that doesn't work any better than a simple spoon... actually, the regular spoon works better. lol