The GSI Outdoors Coffee Rocket is a clever coffee maker for backpackers who prefer pour-overs without packing much more than coffee mugs. In fact, this original design folds up to fit in the GSI Outdoors Infinity Backpacker Mug, and its folding legs grip any mug you want. Simply fill the blue cap with coffee grounds, attach the drip cone, pour water in, and watch the Coffee Rocket make 3. 5fl oz of freshly roasted coffee at campsites far off.