Empty and wash out a two or three-pound coffee can. Punch three equidistant holes near the rim—not on the lid itself.
Include three 20-inch pieces of twine. If you are in a scenario in which you have no water available, you can fill the can with snow and tie the twine through the holes to suspend the can over a flame, melting the snow.
Include three large safety pins for suspending the can from the roof of your vehicle.
Plan for your nutritional needs by throwing in packets of soup and hot chocolate, along with protein bars, jerky, dehydrated fruit and nuts.
Being trapped may be a lonely experience. Pack a small book or other reading material to pass the time.
Pack clothing and other accessories to keep you warm, such as extra gloves and socks, a hat, and thermal heat packs.
Pack heat sources, such as candles and matches, both for heating a snow-filled coffee can and igniting flares.
Take along light sources, such as a flashlight, road flares and glow sticks.
Remember that you may have to perform routine bodily functions—pack a roll of toilet paper.