Compressed biscuits are made of wheat flour, sugar, oil, and dairy products as the main raw materials.

Generally, the high energy biscuits as emergency preparedness need to be long shelf life when placed at room temperature. And common high energy biscuits only can be placed at room temperature for about three years.

The earliest ready-to-eat rations were provisions that soldiers carried with them to eat in battle. Ready-to-eat rations first appeared in Napoleonic times, and at first they were tinned, simple in variety and mediocre in taste.