I've never been on patrol like that (Thank you for your service, by the way!) but there have been a few Scout camps when I resorted to eating coffee grounds with a swig of water. (Never trust a camp cook or chef who isn't a coffee drinker. LOL!) I dated a Canadian soldier once who said he preferred his that way, but it's far too uncivilized for me unless it's to ward off a weather-related headache or caffeine withdrawal.