Who knows how long you’re going to have to wait until help gets to you. What if there is a storm and even rescue teams can’t reach you? You know that’s quite possible if you watch movies. You need food regardless of whether you're standed for hours or days. The best snacks for these kinds of situations are high-calories energy and protein bars. A few can provide more than 2,000 calories to keep you nourished and energized without the refined sugar and sodium. The ER Emergency Food Bar is supposed to last you for three days.