An emergency is the worst time to realize how dependent we are on electricity. Whether it’s a severe storm that causes loss of power at home or running out of fuel on a deserted road, most of us are under-prepared for unexpected circumstances. And one of the first things that you’ll miss during such a crisis? Light.

Flashlights and emergency lights will only last for so long before their batteries drain. But turns out that there’s another way to generate light when you need it most, and practically all it takes is a tuna can.

I always liked tuna, even before I learned it can double as a torch! The fact that you can actually still eat the tuna afterwards makes tuna cans a must in any survival kit.