I have two Otter boxes, a 5 and a 15. The 15 I'm going to fill up and send to my buddy in Iraq b/c he just had a kid and likes cigars. It should hold its Humidity pretty well in the desert. I figure with a tube of beads or cyristals, he should be able to keep cigars in there for his whole deployment. I'm flying out to Colorado tomorrow and plan on testing out the 15 count Otter box's valve then.