I keep Cinnamon granola bars in my car. I often eat them for lunch. They are essentially modern day hardtack, and keep for a long time in all sorts of temperature extremes. Since my job involves driving all over 3 states many days, having supplies in my vehicle is a no-brainer. The cinnamon almonds from Walmart are really awesome too. Too bad they started making the bags smaller (for the same price of course).

Greg