probably add a scissors and needle nose pliers to the tools section, especially if in an urban environment!
otherwise, I'd focus on more food-maker components,
like having a kombucha scoby in there in a glass jar (and a bottle with a balloon on it once its finishing), spirulina for energy (in a plastic bottle) leave in sunlight for the day but always a boost and nutrients, perhaps with extra bottle of the nutrient mixture (see the wiki article), ground coffee or instant powder if its not at the hackerspace, rice n dry beans?, water purification?, even salt n pepper? :D
a tarp and sleeping bag if you are slick or hardcore, or else you've already dug in somewhere with that shovel <3