Cornish pasties were made for miners and included freshcook meat, potatoes, onion, garlic, salt, and pepper, all wrapped in a sturdy crust, made with a dough handle for the husbands who worked in the minds. The handle was ingenious as it gave the minors with dirty hands something to hang onto.. There was no refrigeration available either. The miners didn't suffer from eating the pasties. , it was a thing of necessity.
That being said today, there is no reason to risk tainted food.
My Dada and I used to bring sandwiches and milk with us when we headed for the trout stream. The streams were sprig-fed cold water. The milk, or soda, and the sandwiches were placed into water-tight bags. into a net, and tied to a log, or tree with the bag submerged in the cold water. It worked great. Be safe.
Seeeeya; Chief Longwind of the North