There are a wide range of these available. This is essentially the MRE category. I like the first strike Meals, these are a full day of rations in a single package, the non essentials have been stripped away and they are a pretty compact package for the content. There are a lot of options available, however, so you can pick what works for you. I don’t recommend MREs as a staple of your food storage program. Shelf life is marginal and fluctuates with temperature, they are bulky on a per calorie basis, and they are cost prohibitive. However, they are very convenient and have a place as a supplemental portion of your food storage program.
After 9/11, my dad filled a duffel bag with some energy bars, a couple gallons of water, some penicillin, and a map. Amid scaremongering headlines about imminent anthrax and “dirty bomb” attacks in the city, he wanted to have some supplies on hand in case we needed to get out of Brooklyn fast. Were he to assemble such a bag today, he’d likely stumble on a number of companies promising a more wholesale brand of disaster preparedness: a box full of shelf-stable freeze-dried meals, to be revived from their dessicated state with the addition of boiled water.