If a first aid kit is a codification of essential medical supplies, then a mini first aid kit is surely a codification of medical supplies that cannot at all be done without. Granted, the specific environmental context of a place will have to be taken into account when creating a first aid kit. Seeing as there are so many vastly varied biomes around the world featuring different wildlife and climates, it stands to reason that there cannot be a single first aid kit to fulfill every climate and situation.