SOS Millennium Bars are formulated and packaged to endure temperature extremes and have an extended shelf life of up to five years! These bars are also low in sodium. 400 calories per bar. These emergency food bars were designed to provide a quick, nutritious source of energy in an emergency. The New Millennium Bars are great for auto, home, and school emergency kits. Also good for disaster aid, hiking, camping and travel use. Make sure to add these calorie food bars to your preparedness plan. They’re about the size of a regular candy bar and ideal for school, office and home kits.