There's no shortage of outdoor brewing solutions, but we're always interested to see a new one, especially one that's remarkably easy. The Coffeebrewer from Grower's Cup is basically a big, pre-filled, enclosed coffee filter in a bag. All you need to do is pour a half-liter of hot water in it, and you have yourself three cups of coffee.
The downside is that it takes 5 - 8 minutes to steep and brew, so there'll be a decent gap between unzipping your bag and taking that first steaming sip. Still, there's something attractive about just throwing hot water in a bag and getting enough coffee to last one or two people the entire morning. Unfortunately for us US folks, it appears to be available in Europe only. Then again, we do have Nature's Kettle, which looks even more user friendly. More info