We will and we do.
That's how to boil water to cook food in a waterproof wooden box.
Do your own thing.
Not boasting or anything, but many years ago me and a friend decided to disappear to our favourite spot and see how long we’d last. There’s a spring for fresh water available only when the River Arun was low tide at Littlehampton, and now blocked with a steel plate and concrete
, so we had plenty of water to drink and boil. Lived in an ancient canvas bell tent on skinny sleep mats and cheap bags without a groundsheet for nearly 3 weeks. Spent the days building, carving, wood collecting, listening to Hendrix, Larry Coryell, Miles, Zappa, Don Cherry etc on a crappy cassette player that loved our most precious commodity...D-Cells. I still have a little Beech tobacco pipe I bored out with red hot tent pegs because we’d run out of Rizlas. Good times.
After a week we wanted more than tinned goods so we built a kiln like covered oven of flint and managed to create a perfect lasagne, and mix dough for pizza, or something resembling pizza that tasted pretty good. Foil wrapped pork chops with Ramson leaves and potato slices were put in to slow cook were bloody delicious. Good times, but the oven collapsed one night in a rainstorm and it wasn’t too long after that we went home to a better bath than jumping in the river between tides. A fine “life” memory that I’m enjoying writing about, I’m very fond of it.