Who has a knife sharpener anyway? If my scissors get dull, I buy a new pair. It's the same routine with knives. Uh oh, my knives don't cut like they used to, it's time to get some new ones! Well.... that was before I learned this life hack. If you don't have a sharpener, you just take a ceramic mug. Turn the mug upside down. Sharpen your scissors or your knives on the bottom of the mug. Crazy.