Food is a good way to warm you up while its cold but on the opposite it can be a killer at normal temperatures, it slowly drains your health. Please consider to add once you drop the food and its on the ground, depending if its normal conditions or raining, the warmth of the items get lower and lower the longer in on the ground, and even faster when its raining. Its pretty unrealisitc to remain 75° for such a long long time
Also, why should meat stay at its temperature when its just sitting in your pockets. To keep it at its warmth why do you not nee to put in in cooking pots or other containers to remain warm