The capitalist mode of production is born when labor power itself becomes a commodity, bought and sold. It is a commodity with a unique quality: it creates more value than it costs; it produces surplus-value. This is the shortest possible definition of capitalism: production for surplus-value.
Rice and beans are inexpensive foods that can be stored for 30 years or more if properly packaged, making them good candidates for emergency preparedness food supply. You can store a mixture of beans or a mixture of different rice types, but you must store rice and beans in separate containers. While simple canisters and plastic bags work well for general use storage, long-term storage requires air-tight containers and moisture prevention to prevent food spoilage.
That is 3 days in the fridge continuously. Anything taken out left on the bench or reheated is disposed of at the end of the day/shift. Personally, I don't keep rice longer than 3 days in the fridge and when I do reheat it, I reheat only what is to be eaten, no more. Left over reheated rice is thrown out. Given that you can easily cook very small portions of rice and the relative low cost of it.