Smith's Sharpener Carbide, Ceramic, & Diamond Knife Sharpener
You won't always have the space for a heavy-duty electric sharpener or sharpening stones, especially when you're going camping or hunting in the wild, where storage space is at a premium. In that case, try this pocket-sized sharpener, which packs in carbide, ceramic, and diamond sharpener edges that are replaceable. This stone is made for medium-to-coarse sharpening, and works well with both serrated and straight edges. It's quick, accurate, and -- most importantly -- portable. It even includes a lanyard hole so you can keep it around your neck or on your bag.