For home cooks, onions are a staple in the kitchen. To keep onions fresh, grab some pantyhose that have a run in them, and upcycle them into a hanging onion storage net. Simply drop a whole onion into one leg of the pantyhose and tie a knot; keep repeating until each leg is full. Hang the stockings in a dark, cool place where you store pantry staples. Onions prefer this kind of environment to stay fresh, and mice and other rodents do not like the smell of onions, so storing food near your netted onions will deter them.