Am I the only one to see irony here? A fully equipped hunter carries a firearm, ammunition, optics, hunting knife, a camera, assorted calls,game bag, Orange safety clothing and license. Then our nimrod stakes his survival on the contents of a film canister. An Altoid tin is small enough. LOL ;O). We have a hunting knife. The game bag is now an emergency shelter. Nobody is going to respond to gunfire as an emergency signal. You need fire and and signalling devises.