I put ground coffee in a small baggie in a larger ziplock and it STILL made everything in the bear can smell like coffee.

And then, one of my pita rounds developed mold. Needless to say I soaked the bear can full of baking soda solution when I got home. On the trail, I ate the meal in the foodsaver bag not the one in the regular ziplock, which smelled (and consequently tasted) like moldy coffee. The nylon foodsaver bags are a godsend. They don't seem to let odor out or in.

Even my licorice tasted moldy. Ugh, that was bad. Note to self: buy pita night before the trip. Don't use the week old stuff in the fridge.

As for what to do with the coffee... I'm going to cut smaller sections off a roll of the vacuum packing bags and make small bags to seal individual coffee servings in them, when I absolutely have to have fresh coffee in camp.