in my neck of the woods and the kind of survival that i'm really concerned about,dump in a lake canoe tripping and loose all the gear,something to cook a cup of sweet tea or soup in is %100 necessary.it was the search for a metal container with a lid that would fit in my PFD pocket that brought me to this site.i found no such thing and am using the canteen cup from a old Swiss Army canteen set for now.sealed with zip locks and duct tape it's waterproof so far--but what i really want to find is a Spam type can i can load up and run thru a can sealer,but so far no luck,the Spam people sent me a nice Email.."sorry we don't sell our cans empty"