Emergencies, may happen at any given time, from natural to civil unrest. Even if you are just camping, people take supplies they believe they will need, what about the unpredicted? Do I have enough water? Will I have reception? Do I have extra fuel? Either way it creates a burden on the individual or more importantly the family.
Even if you believe you have perfect teeth, there is always a chance a dental issue may arise, that’s why I always carry dental cement, such as Dentemp ®.
Another key would be matches, since having a fire is important to boil water, for heat, and morale, waterproof matches kept in an old prescription bottle.