This is sort of a redirection of the "compact food' thread,which has wandered....

What should be routine items carried in one's vehicle? A lot of the items mentioned as required in some countries make a lot of sense, like high vis vests, specs (if you must have them to drive), warning triangles, etc.

My short, tentative list:

water and at least a few healthy snacks
duct tape
hand tools -crescent wrench, screwdrivers at least
jumper cables
some sort of rain gear or poncho
small stove, pot, coffee or tea
shovel and ax

I probably should have something to deal with flats - tire sealant, hand pump, etc.

What else?