Multi-purpose. Not lots to carry, great little vitamin packs. The dry goods are the important parts, at least city-wise. Out of the city, and I've been hunting with a bow for over 35 years. In an invasion scenario, my boss said he'd gladly pass me a couple rifles, we're well armed in that scenario, and everyone I work with is either retired military, ex-cons, or both. Travel to the closest meeting place is 20 miles. With 5 vehicles to get me from A to B, I can manage. In a medical pandemic, everything is already in place to just vacate civilization, right in the middle of it. Abundant fresh water, filtered and stored, heat and cooling sources (think CO2 production...) grill with gas, additional grill for wood, wood supply. Generator in place, guard dogs, and plenty of frozen supplies, ability to quarantine/harden about a 1/4 acre so that food can be grown. There are 3 of us and 2 dogs I would take care of. Everyone else goes in my ration pack.
While I fantasize about the invasion scenario, I'm not stupid, I know that what's more likely is a melt-down scenario, where a pandemic hits the 17-40 healthy males again (like the Spanish Flu) and causes military and financial collapse. An attempt to enforce marshal law would most likely be made... In the collapse scenario, staying put and having fire as my ally, I can't help but come out ahead. (and a warlord!)