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Sharpening a knife at home isn’t a big deal when you have a knife sharpener around, however, as usual when you need something you won’t find it. I would always use another knife to sharpen my knife in those cases. But what if you are outdoors and you don’t have another knife? Or what if you want a quick solution and your hands are dirty and you don’t want to open drawers. Well, there are many different scenarios so it’s better to know all the options. Using a flat stone or a piece of concrete is probably obvious, but using the bottom of a mug is something new to me. To know more please follow the link below: