VitalGrill
Whether you're outdoors by choice or by necessity, the VitalGrill ($80-$170) will let you cook up a tasty meal using nothing but a couple batteries and whatever burnables you can find. Available in stove and barbecue varieties, the VitalGrill is powered by two AA batteries that run a blower fan, allowing your fire to produce up to 20,000 BTU of heat while your food cooks in no time. Being a product designed for the outdoors, it's easily collapsible, making it a no-brainer to include in your "shit just hit the fan" bag.