After air and water we all need food. As a general rule human will die within three minutes without air, three days without water and three weeks without food. These are variable depending on fitness and overal health as well as many other factors. Those that are older or less fit, will typically need air before 3 minutes and water before three days.
I keep extra water on hand at home as well as in my vehicle, which I
prefer to store in glass, because plastic leaches chemicals into the
water when heated and vehicles get very hot in the desert. I
also keep some extra food at home and in the vehicle.
One item that seems good is the Chef's Banquet All-purpose Readiness Kit.
There are many products and do some research on your own and
what meets your needs. A roughly 2,000 calorie diet.
Here are a couple more:
Chef's Banquet Freeze Dried Fruit Variety Bucket-300 Servings
Chef's Banquet Freeze Dried Vegetable Variety Bucket-320 Servings